/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/recursive-simple/sum_20x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:57:12,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:57:12,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:57:12,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 17:57:12,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:57:12,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:57:12,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:57:12,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:57:12,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:57:12,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:57:12,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:57:12,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:57:12,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:57:12,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:57:12,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:57:12,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:57:12,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:57:12,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 17:57:12,263 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:57:12,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:57:12,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:57:12,270 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:57:12,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:57:12,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:57:12,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:57:12,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:57:12,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:57:12,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:57:12,273 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:57:12,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:57:12,274 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:57:12,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:57:12,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:57:12,274 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:57:12,275 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:57:12,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:57:12,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:57:12,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:57:12,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:57:12,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:57:12,276 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:57:12,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:57:12,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:57:12,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:57:12,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:57:12,745 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:57:12,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_20x0-1.c [2021-02-23 17:57:12,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc54c4d16/42aab52a10254066b229a22d52abec67/FLAG30ecc303b [2021-02-23 17:57:13,404 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:57:13,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_20x0-1.c [2021-02-23 17:57:13,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc54c4d16/42aab52a10254066b229a22d52abec67/FLAG30ecc303b [2021-02-23 17:57:13,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc54c4d16/42aab52a10254066b229a22d52abec67 [2021-02-23 17:57:13,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:57:13,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:57:13,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:57:13,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:57:13,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:57:13,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:57:13" (1/1) ... [2021-02-23 17:57:13,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cfcaf23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:13, skipping insertion in model container [2021-02-23 17:57:13,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:57:13" (1/1) ... [2021-02-23 17:57:13,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:57:13,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:57:14,057 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_20x0-1.c[481,494] [2021-02-23 17:57:14,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:57:14,075 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:57:14,090 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_20x0-1.c[481,494] [2021-02-23 17:57:14,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:57:14,108 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:57:14,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:14 WrapperNode [2021-02-23 17:57:14,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:57:14,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:57:14,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:57:14,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:57:14,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:14" (1/1) ... [2021-02-23 17:57:14,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:14" (1/1) ... [2021-02-23 17:57:14,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:14" (1/1) ... [2021-02-23 17:57:14,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:14" (1/1) ... [2021-02-23 17:57:14,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:14" (1/1) ... [2021-02-23 17:57:14,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:14" (1/1) ... [2021-02-23 17:57:14,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:14" (1/1) ... [2021-02-23 17:57:14,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:57:14,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:57:14,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:57:14,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:57:14,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:57:14,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:57:14,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:57:14,300 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:57:14,300 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-02-23 17:57:14,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:57:14,300 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:57:14,300 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:57:14,301 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:57:14,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:57:14,301 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-02-23 17:57:14,302 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:57:14,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:57:14,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:57:14,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:57:14,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:57:14,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:57:14,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:57:14,588 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:57:14,588 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 17:57:14,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:57:14 BoogieIcfgContainer [2021-02-23 17:57:14,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:57:14,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:57:14,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:57:14,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:57:14,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:57:13" (1/3) ... [2021-02-23 17:57:14,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329caf54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:57:14, skipping insertion in model container [2021-02-23 17:57:14,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:57:14" (2/3) ... [2021-02-23 17:57:14,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329caf54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:57:14, skipping insertion in model container [2021-02-23 17:57:14,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:57:14" (3/3) ... [2021-02-23 17:57:14,617 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_20x0-1.c [2021-02-23 17:57:14,640 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:57:14,657 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:57:14,707 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:57:14,736 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:57:14,737 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:57:14,737 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:57:14,737 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:57:14,737 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:57:14,737 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:57:14,738 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:57:14,738 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:57:14,755 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-02-23 17:57:14,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 17:57:14,768 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:14,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:14,769 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:14,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:14,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1485133070, now seen corresponding path program 1 times [2021-02-23 17:57:14,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:14,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87374196] [2021-02-23 17:57:14,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:14,858 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:14,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:14,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:14,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:15,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:15,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:15,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:15,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,136 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:15,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:57:15,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87374196] [2021-02-23 17:57:15,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:15,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 17:57:15,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506064242] [2021-02-23 17:57:15,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 17:57:15,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:15,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 17:57:15,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-23 17:57:15,223 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 7 states. [2021-02-23 17:57:15,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:15,500 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-02-23 17:57:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 17:57:15,502 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-02-23 17:57:15,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:15,513 INFO L225 Difference]: With dead ends: 48 [2021-02-23 17:57:15,514 INFO L226 Difference]: Without dead ends: 33 [2021-02-23 17:57:15,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-23 17:57:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-23 17:57:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-02-23 17:57:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-23 17:57:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-02-23 17:57:15,579 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2021-02-23 17:57:15,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:15,580 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-02-23 17:57:15,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 17:57:15,580 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-02-23 17:57:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-23 17:57:15,582 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:15,583 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] [2021-02-23 17:57:15,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:57:15,583 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:15,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:15,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1822905144, now seen corresponding path program 1 times [2021-02-23 17:57:15,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:15,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808105846] [2021-02-23 17:57:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:15,589 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:15,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:15,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:15,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:15,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:15,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:15,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:15,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,739 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:15,750 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:15,751 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-23 17:57:15,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808105846] [2021-02-23 17:57:15,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:15,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 17:57:15,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259903731] [2021-02-23 17:57:15,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 17:57:15,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:15,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 17:57:15,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-23 17:57:15,766 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2021-02-23 17:57:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:15,987 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-02-23 17:57:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 17:57:15,987 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2021-02-23 17:57:15,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:15,989 INFO L225 Difference]: With dead ends: 44 [2021-02-23 17:57:15,989 INFO L226 Difference]: Without dead ends: 38 [2021-02-23 17:57:15,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-23 17:57:15,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-23 17:57:16,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-02-23 17:57:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-23 17:57:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-23 17:57:16,005 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2021-02-23 17:57:16,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:16,006 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-23 17:57:16,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 17:57:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-23 17:57:16,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 17:57:16,008 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:16,008 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-02-23 17:57:16,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:57:16,009 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:16,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:16,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1004193542, now seen corresponding path program 2 times [2021-02-23 17:57:16,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:16,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667184820] [2021-02-23 17:57:16,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:16,013 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:16,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:16,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:16,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,215 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:16,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-02-23 17:57:16,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667184820] [2021-02-23 17:57:16,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:16,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 17:57:16,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512703627] [2021-02-23 17:57:16,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 17:57:16,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:16,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 17:57:16,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:57:16,264 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 9 states. [2021-02-23 17:57:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:16,535 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-02-23 17:57:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 17:57:16,536 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2021-02-23 17:57:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:16,537 INFO L225 Difference]: With dead ends: 49 [2021-02-23 17:57:16,538 INFO L226 Difference]: Without dead ends: 43 [2021-02-23 17:57:16,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-23 17:57:16,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-23 17:57:16,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-02-23 17:57:16,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-23 17:57:16,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-02-23 17:57:16,553 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 44 [2021-02-23 17:57:16,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:16,553 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-02-23 17:57:16,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 17:57:16,554 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-02-23 17:57:16,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-23 17:57:16,556 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:16,556 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:16,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:57:16,556 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:16,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:16,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1655724848, now seen corresponding path program 3 times [2021-02-23 17:57:16,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:16,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025306934] [2021-02-23 17:57:16,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:16,560 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,603 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:16,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,609 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:16,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:16,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,715 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,716 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,776 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:16,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:16,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:16,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-02-23 17:57:16,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025306934] [2021-02-23 17:57:16,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:16,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 17:57:16,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683615934] [2021-02-23 17:57:16,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 17:57:16,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:16,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 17:57:16,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-23 17:57:16,911 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 10 states. [2021-02-23 17:57:17,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:17,266 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-02-23 17:57:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 17:57:17,266 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2021-02-23 17:57:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:17,268 INFO L225 Difference]: With dead ends: 54 [2021-02-23 17:57:17,268 INFO L226 Difference]: Without dead ends: 48 [2021-02-23 17:57:17,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-02-23 17:57:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-23 17:57:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-02-23 17:57:17,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-23 17:57:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-02-23 17:57:17,283 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 53 [2021-02-23 17:57:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:17,284 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-02-23 17:57:17,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 17:57:17,284 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-02-23 17:57:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-23 17:57:17,285 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:17,286 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:17,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 17:57:17,286 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:17,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:17,287 INFO L82 PathProgramCache]: Analyzing trace with hash 54098690, now seen corresponding path program 4 times [2021-02-23 17:57:17,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:17,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664767674] [2021-02-23 17:57:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:17,290 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:17,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:17,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:17,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,390 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,414 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,437 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:17,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-02-23 17:57:17,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664767674] [2021-02-23 17:57:17,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:17,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 17:57:17,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437417595] [2021-02-23 17:57:17,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 17:57:17,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:17,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 17:57:17,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-23 17:57:17,522 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 11 states. [2021-02-23 17:57:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:17,902 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-02-23 17:57:17,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 17:57:17,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2021-02-23 17:57:17,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:17,905 INFO L225 Difference]: With dead ends: 59 [2021-02-23 17:57:17,905 INFO L226 Difference]: Without dead ends: 53 [2021-02-23 17:57:17,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-02-23 17:57:17,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-23 17:57:17,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-02-23 17:57:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-23 17:57:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-02-23 17:57:17,918 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 62 [2021-02-23 17:57:17,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:17,919 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-02-23 17:57:17,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 17:57:17,919 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-02-23 17:57:17,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-23 17:57:17,921 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:17,921 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:17,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 17:57:17,921 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:17,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:17,922 INFO L82 PathProgramCache]: Analyzing trace with hash -406982872, now seen corresponding path program 5 times [2021-02-23 17:57:17,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:17,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849961264] [2021-02-23 17:57:17,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:17,925 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:17,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:17,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:17,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:17,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:17,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:17,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,059 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:18,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-02-23 17:57:18,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849961264] [2021-02-23 17:57:18,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:18,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-23 17:57:18,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684196187] [2021-02-23 17:57:18,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 17:57:18,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:18,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 17:57:18,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-02-23 17:57:18,164 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 12 states. [2021-02-23 17:57:18,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:18,626 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-02-23 17:57:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 17:57:18,626 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2021-02-23 17:57:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:18,628 INFO L225 Difference]: With dead ends: 64 [2021-02-23 17:57:18,628 INFO L226 Difference]: Without dead ends: 58 [2021-02-23 17:57:18,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-02-23 17:57:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-23 17:57:18,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-02-23 17:57:18,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-23 17:57:18,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-02-23 17:57:18,643 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 71 [2021-02-23 17:57:18,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:18,644 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-02-23 17:57:18,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 17:57:18,644 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-02-23 17:57:18,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-02-23 17:57:18,645 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:18,646 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:18,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 17:57:18,646 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:18,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:18,647 INFO L82 PathProgramCache]: Analyzing trace with hash 507179274, now seen corresponding path program 6 times [2021-02-23 17:57:18,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:18,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499965782] [2021-02-23 17:57:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:18,649 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:18,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:18,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:18,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,774 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,781 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,922 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,923 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,942 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:18,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:18,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,961 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:18,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:18,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-02-23 17:57:19,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499965782] [2021-02-23 17:57:19,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:19,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-23 17:57:19,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501883170] [2021-02-23 17:57:19,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 17:57:19,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:19,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 17:57:19,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-02-23 17:57:19,014 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 13 states. [2021-02-23 17:57:19,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:19,512 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-02-23 17:57:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 17:57:19,513 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2021-02-23 17:57:19,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:19,517 INFO L225 Difference]: With dead ends: 69 [2021-02-23 17:57:19,517 INFO L226 Difference]: Without dead ends: 63 [2021-02-23 17:57:19,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-02-23 17:57:19,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-02-23 17:57:19,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-02-23 17:57:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-23 17:57:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-02-23 17:57:19,549 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 80 [2021-02-23 17:57:19,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:19,550 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-02-23 17:57:19,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 17:57:19,551 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-02-23 17:57:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-23 17:57:19,559 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:19,559 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:19,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 17:57:19,559 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:19,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:19,560 INFO L82 PathProgramCache]: Analyzing trace with hash -326332640, now seen corresponding path program 7 times [2021-02-23 17:57:19,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:19,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005233458] [2021-02-23 17:57:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:19,564 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:19,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:19,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:19,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,739 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,789 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:19,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,895 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:19,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:19,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-02-23 17:57:19,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005233458] [2021-02-23 17:57:19,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:19,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-23 17:57:19,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214126508] [2021-02-23 17:57:19,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 17:57:19,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:19,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 17:57:19,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-02-23 17:57:19,980 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 14 states. [2021-02-23 17:57:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:20,482 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-02-23 17:57:20,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 17:57:20,483 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2021-02-23 17:57:20,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:20,484 INFO L225 Difference]: With dead ends: 74 [2021-02-23 17:57:20,485 INFO L226 Difference]: Without dead ends: 68 [2021-02-23 17:57:20,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2021-02-23 17:57:20,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-02-23 17:57:20,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-02-23 17:57:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-02-23 17:57:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-02-23 17:57:20,501 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 89 [2021-02-23 17:57:20,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:20,501 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-02-23 17:57:20,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 17:57:20,502 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-02-23 17:57:20,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-02-23 17:57:20,503 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:20,503 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:20,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 17:57:20,503 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:20,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:20,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1949113106, now seen corresponding path program 8 times [2021-02-23 17:57:20,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:20,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845444553] [2021-02-23 17:57:20,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:20,506 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:20,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:20,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,572 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:20,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,603 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,660 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,686 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,735 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:20,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:20,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:20,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:20,905 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-02-23 17:57:20,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845444553] [2021-02-23 17:57:20,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:20,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-23 17:57:20,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34001339] [2021-02-23 17:57:20,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 17:57:20,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:20,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 17:57:20,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-02-23 17:57:20,907 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 15 states. [2021-02-23 17:57:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:21,449 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-02-23 17:57:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-23 17:57:21,450 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 98 [2021-02-23 17:57:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:21,451 INFO L225 Difference]: With dead ends: 79 [2021-02-23 17:57:21,451 INFO L226 Difference]: Without dead ends: 73 [2021-02-23 17:57:21,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-02-23 17:57:21,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-23 17:57:21,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-02-23 17:57:21,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-23 17:57:21,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-02-23 17:57:21,484 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 98 [2021-02-23 17:57:21,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:21,485 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-02-23 17:57:21,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 17:57:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-02-23 17:57:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-02-23 17:57:21,486 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:21,486 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:21,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 17:57:21,487 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:21,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1213774616, now seen corresponding path program 9 times [2021-02-23 17:57:21,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:21,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130510782] [2021-02-23 17:57:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:21,490 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:21,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:21,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:21,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:21,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:21,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:21,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:21,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:21,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:21,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:21,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:21,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,751 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,752 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:21,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:21,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:21,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:21,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:21,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:21,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-02-23 17:57:21,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130510782] [2021-02-23 17:57:21,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:21,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-23 17:57:21,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403906300] [2021-02-23 17:57:21,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 17:57:21,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:21,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 17:57:21,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-02-23 17:57:21,917 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 16 states. [2021-02-23 17:57:22,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:22,546 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-02-23 17:57:22,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-23 17:57:22,547 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 107 [2021-02-23 17:57:22,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:22,548 INFO L225 Difference]: With dead ends: 84 [2021-02-23 17:57:22,548 INFO L226 Difference]: Without dead ends: 78 [2021-02-23 17:57:22,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=512, Unknown=0, NotChecked=0, Total=756 [2021-02-23 17:57:22,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-23 17:57:22,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-02-23 17:57:22,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-23 17:57:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-02-23 17:57:22,565 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 107 [2021-02-23 17:57:22,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:22,565 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-02-23 17:57:22,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 17:57:22,566 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-02-23 17:57:22,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-02-23 17:57:22,567 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:22,567 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:22,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 17:57:22,567 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:22,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:22,568 INFO L82 PathProgramCache]: Analyzing trace with hash -241993446, now seen corresponding path program 10 times [2021-02-23 17:57:22,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:22,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21472861] [2021-02-23 17:57:22,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:22,570 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,603 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:22,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:22,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,634 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:22,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,667 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,697 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,730 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,881 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,909 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:22,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:22,966 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:22,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:22,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-02-23 17:57:23,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21472861] [2021-02-23 17:57:23,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:23,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-23 17:57:23,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425878698] [2021-02-23 17:57:23,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 17:57:23,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:23,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 17:57:23,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-02-23 17:57:23,135 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 17 states. [2021-02-23 17:57:23,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:23,818 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2021-02-23 17:57:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 17:57:23,819 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 116 [2021-02-23 17:57:23,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:23,821 INFO L225 Difference]: With dead ends: 89 [2021-02-23 17:57:23,821 INFO L226 Difference]: Without dead ends: 83 [2021-02-23 17:57:23,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-02-23 17:57:23,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-23 17:57:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-02-23 17:57:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-02-23 17:57:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-02-23 17:57:23,846 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 116 [2021-02-23 17:57:23,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:23,846 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-02-23 17:57:23,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 17:57:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-02-23 17:57:23,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-02-23 17:57:23,851 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:23,851 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:23,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 17:57:23,852 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:23,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:23,852 INFO L82 PathProgramCache]: Analyzing trace with hash -790695152, now seen corresponding path program 11 times [2021-02-23 17:57:23,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:23,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601072205] [2021-02-23 17:57:23,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:23,858 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:23,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:23,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:23,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:23,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:23,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:23,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:24,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:24,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:24,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:24,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:24,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:24,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,267 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:24,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:24,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:24,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:24,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:24,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:24,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:24,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:24,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-02-23 17:57:24,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601072205] [2021-02-23 17:57:24,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:24,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-23 17:57:24,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564198701] [2021-02-23 17:57:24,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 17:57:24,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:24,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 17:57:24,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-02-23 17:57:24,522 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 18 states. [2021-02-23 17:57:25,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:25,262 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-02-23 17:57:25,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-23 17:57:25,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 125 [2021-02-23 17:57:25,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:25,264 INFO L225 Difference]: With dead ends: 94 [2021-02-23 17:57:25,264 INFO L226 Difference]: Without dead ends: 88 [2021-02-23 17:57:25,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2021-02-23 17:57:25,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-02-23 17:57:25,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-02-23 17:57:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-02-23 17:57:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-02-23 17:57:25,279 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 125 [2021-02-23 17:57:25,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:25,279 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-02-23 17:57:25,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 17:57:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-02-23 17:57:25,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-02-23 17:57:25,281 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:25,281 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:25,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 17:57:25,282 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:25,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:25,282 INFO L82 PathProgramCache]: Analyzing trace with hash -126776542, now seen corresponding path program 12 times [2021-02-23 17:57:25,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:25,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599968534] [2021-02-23 17:57:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:25,285 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,319 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:25,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:25,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:25,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,493 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,493 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,526 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,527 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,570 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,790 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,791 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,792 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:25,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:25,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:25,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:25,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-02-23 17:57:26,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599968534] [2021-02-23 17:57:26,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:26,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-23 17:57:26,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602842188] [2021-02-23 17:57:26,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-23 17:57:26,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:26,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-23 17:57:26,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-02-23 17:57:26,019 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 19 states. [2021-02-23 17:57:26,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:26,736 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2021-02-23 17:57:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-23 17:57:26,736 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 134 [2021-02-23 17:57:26,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:26,738 INFO L225 Difference]: With dead ends: 99 [2021-02-23 17:57:26,738 INFO L226 Difference]: Without dead ends: 93 [2021-02-23 17:57:26,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=752, Unknown=0, NotChecked=0, Total=1122 [2021-02-23 17:57:26,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-02-23 17:57:26,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-02-23 17:57:26,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-02-23 17:57:26,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-02-23 17:57:26,753 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 134 [2021-02-23 17:57:26,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:26,753 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-02-23 17:57:26,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-23 17:57:26,754 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-02-23 17:57:26,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-02-23 17:57:26,755 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:26,756 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:26,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 17:57:26,756 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:26,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:26,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1918613256, now seen corresponding path program 13 times [2021-02-23 17:57:26,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:26,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285935002] [2021-02-23 17:57:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:26,759 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:26,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:26,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:26,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:26,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:26,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:26,801 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:26,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:26,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:26,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:26,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:26,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:26,861 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:26,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:26,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:26,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:26,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:26,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:26,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:26,907 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:26,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:26,942 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:26,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:26,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:26,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:26,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:26,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:26,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:26,985 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:26,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:26,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:27,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:27,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:27,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:27,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,136 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:27,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:27,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,190 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,191 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:27,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,217 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:27,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:27,263 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:27,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:27,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:27,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-02-23 17:57:27,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285935002] [2021-02-23 17:57:27,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:27,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-02-23 17:57:27,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786018351] [2021-02-23 17:57:27,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-23 17:57:27,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:27,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-23 17:57:27,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-02-23 17:57:27,452 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 20 states. [2021-02-23 17:57:28,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:28,340 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2021-02-23 17:57:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 17:57:28,340 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 143 [2021-02-23 17:57:28,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:28,342 INFO L225 Difference]: With dead ends: 104 [2021-02-23 17:57:28,342 INFO L226 Difference]: Without dead ends: 98 [2021-02-23 17:57:28,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=418, Invalid=842, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 17:57:28,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-02-23 17:57:28,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-02-23 17:57:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-02-23 17:57:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2021-02-23 17:57:28,360 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 143 [2021-02-23 17:57:28,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:28,360 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2021-02-23 17:57:28,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-23 17:57:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2021-02-23 17:57:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-02-23 17:57:28,363 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:28,363 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:28,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 17:57:28,364 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:28,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:28,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1212862762, now seen corresponding path program 14 times [2021-02-23 17:57:28,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:28,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756645258] [2021-02-23 17:57:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:28,367 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:28,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:28,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:28,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,587 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,588 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,627 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,628 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,628 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,664 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,768 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:28,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:28,966 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:28,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:28,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2021-02-23 17:57:29,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756645258] [2021-02-23 17:57:29,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:29,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-02-23 17:57:29,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576734942] [2021-02-23 17:57:29,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-23 17:57:29,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:29,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-23 17:57:29,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-02-23 17:57:29,167 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 21 states. [2021-02-23 17:57:30,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:30,011 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2021-02-23 17:57:30,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-23 17:57:30,011 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 152 [2021-02-23 17:57:30,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:30,013 INFO L225 Difference]: With dead ends: 109 [2021-02-23 17:57:30,013 INFO L226 Difference]: Without dead ends: 103 [2021-02-23 17:57:30,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-02-23 17:57:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-02-23 17:57:30,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-02-23 17:57:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-02-23 17:57:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-02-23 17:57:30,027 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 152 [2021-02-23 17:57:30,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:30,028 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-02-23 17:57:30,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-02-23 17:57:30,028 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-02-23 17:57:30,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-02-23 17:57:30,030 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:30,030 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:30,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-23 17:57:30,031 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:30,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:30,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1200326400, now seen corresponding path program 15 times [2021-02-23 17:57:30,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:30,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061752486] [2021-02-23 17:57:30,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:30,033 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:30,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,075 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:30,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:30,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,362 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,433 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,464 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,465 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,496 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,497 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,526 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,527 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,558 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,587 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,588 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,650 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:30,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,677 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:30,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:30,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-02-23 17:57:30,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061752486] [2021-02-23 17:57:30,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:30,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-02-23 17:57:30,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330387398] [2021-02-23 17:57:30,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 17:57:30,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:30,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 17:57:30,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-02-23 17:57:30,904 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 22 states. [2021-02-23 17:57:31,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:31,740 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2021-02-23 17:57:31,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-23 17:57:31,741 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 161 [2021-02-23 17:57:31,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:31,742 INFO L225 Difference]: With dead ends: 114 [2021-02-23 17:57:31,742 INFO L226 Difference]: Without dead ends: 108 [2021-02-23 17:57:31,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=523, Invalid=1037, Unknown=0, NotChecked=0, Total=1560 [2021-02-23 17:57:31,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-02-23 17:57:31,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-02-23 17:57:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-02-23 17:57:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2021-02-23 17:57:31,758 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 161 [2021-02-23 17:57:31,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:31,759 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2021-02-23 17:57:31,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 17:57:31,759 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2021-02-23 17:57:31,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-02-23 17:57:31,761 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:31,761 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:31,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-23 17:57:31,762 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:31,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:31,762 INFO L82 PathProgramCache]: Analyzing trace with hash -433927374, now seen corresponding path program 16 times [2021-02-23 17:57:31,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:31,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323070907] [2021-02-23 17:57:31,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:31,765 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:31,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:31,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:31,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:31,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:31,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:31,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:31,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:31,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:31,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:31,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:31,895 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:31,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:31,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:31,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:31,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:31,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:31,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:31,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:31,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:31,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:31,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:31,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:31,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:31,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:31,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:32,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:32,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:32,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:32,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:32,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:32,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:32,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:32,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:32,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:32,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:32,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:32,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:32,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:32,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:32,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:32,470 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:32,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-02-23 17:57:32,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323070907] [2021-02-23 17:57:32,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:32,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-02-23 17:57:32,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902803514] [2021-02-23 17:57:32,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-23 17:57:32,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:32,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-23 17:57:32,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-02-23 17:57:32,690 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 23 states. [2021-02-23 17:57:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:33,742 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2021-02-23 17:57:33,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 17:57:33,743 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 170 [2021-02-23 17:57:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:33,744 INFO L225 Difference]: With dead ends: 119 [2021-02-23 17:57:33,744 INFO L226 Difference]: Without dead ends: 113 [2021-02-23 17:57:33,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=580, Invalid=1142, Unknown=0, NotChecked=0, Total=1722 [2021-02-23 17:57:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-23 17:57:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-02-23 17:57:33,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-02-23 17:57:33,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2021-02-23 17:57:33,760 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 170 [2021-02-23 17:57:33,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:33,761 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2021-02-23 17:57:33,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-02-23 17:57:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2021-02-23 17:57:33,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-02-23 17:57:33,763 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:33,764 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:33,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-23 17:57:33,764 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:33,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:33,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1314200840, now seen corresponding path program 17 times [2021-02-23 17:57:33,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:33,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445091598] [2021-02-23 17:57:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:33,767 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:33,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:33,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:33,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:33,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:33,828 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:33,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:33,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:33,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:33,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:33,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:33,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:33,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:33,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:33,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:33,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:33,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:33,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:33,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:33,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:33,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:33,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:33,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:33,989 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:33,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:33,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:34,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:34,070 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,070 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:34,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:34,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:34,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:34,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:34,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:34,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:34,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:34,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:34,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:34,390 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,391 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:34,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,418 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:34,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:34,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:34,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:34,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-02-23 17:57:34,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445091598] [2021-02-23 17:57:34,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:34,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-02-23 17:57:34,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390292814] [2021-02-23 17:57:34,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-23 17:57:34,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:34,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-23 17:57:34,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-02-23 17:57:34,705 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 24 states. [2021-02-23 17:57:35,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:35,769 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2021-02-23 17:57:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-23 17:57:35,769 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 179 [2021-02-23 17:57:35,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:35,771 INFO L225 Difference]: With dead ends: 124 [2021-02-23 17:57:35,771 INFO L226 Difference]: Without dead ends: 118 [2021-02-23 17:57:35,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=640, Invalid=1252, Unknown=0, NotChecked=0, Total=1892 [2021-02-23 17:57:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-02-23 17:57:35,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-02-23 17:57:35,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-02-23 17:57:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2021-02-23 17:57:35,787 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 179 [2021-02-23 17:57:35,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:35,788 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2021-02-23 17:57:35,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-02-23 17:57:35,788 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2021-02-23 17:57:35,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-02-23 17:57:35,790 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:35,791 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:35,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-23 17:57:35,791 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:35,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:35,792 INFO L82 PathProgramCache]: Analyzing trace with hash 75299130, now seen corresponding path program 18 times [2021-02-23 17:57:35,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:35,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084149187] [2021-02-23 17:57:35,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:35,794 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:35,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:35,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:35,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:35,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:35,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:35,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:35,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:35,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:35,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:35,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:35,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:35,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:35,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:35,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:35,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:35,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:35,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:35,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:35,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:35,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,154 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,154 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,295 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,487 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,517 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,519 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,582 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:36,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:36,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:36,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2021-02-23 17:57:36,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084149187] [2021-02-23 17:57:36,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:36,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-02-23 17:57:36,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790139124] [2021-02-23 17:57:36,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-23 17:57:36,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:36,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-23 17:57:36,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2021-02-23 17:57:36,940 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 25 states. [2021-02-23 17:57:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:38,190 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2021-02-23 17:57:38,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-23 17:57:38,191 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 188 [2021-02-23 17:57:38,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:38,193 INFO L225 Difference]: With dead ends: 129 [2021-02-23 17:57:38,193 INFO L226 Difference]: Without dead ends: 123 [2021-02-23 17:57:38,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=703, Invalid=1367, Unknown=0, NotChecked=0, Total=2070 [2021-02-23 17:57:38,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-02-23 17:57:38,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-02-23 17:57:38,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-02-23 17:57:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2021-02-23 17:57:38,210 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 188 [2021-02-23 17:57:38,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:38,211 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2021-02-23 17:57:38,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-02-23 17:57:38,211 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2021-02-23 17:57:38,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-02-23 17:57:38,212 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:38,212 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:38,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-23 17:57:38,213 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:38,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:38,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1886800624, now seen corresponding path program 19 times [2021-02-23 17:57:38,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:38,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268502883] [2021-02-23 17:57:38,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:38,216 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,268 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:38,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:38,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:57:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:57:38,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 17:57:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,465 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,556 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,798 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,923 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,924 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,924 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:38,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:38,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:38,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:39,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:39,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:39,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:39,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:39,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:39,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:39,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:39,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:39,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:39,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:39,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:57:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:57:39,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:39,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:39,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:39,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:57:39,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:57:39,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:57:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2021-02-23 17:57:39,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268502883] [2021-02-23 17:57:39,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:57:39,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-02-23 17:57:39,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656469293] [2021-02-23 17:57:39,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-23 17:57:39,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:57:39,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-23 17:57:39,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2021-02-23 17:57:39,344 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 26 states. [2021-02-23 17:57:40,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:57:40,671 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2021-02-23 17:57:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-23 17:57:40,672 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 197 [2021-02-23 17:57:40,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:57:40,673 INFO L225 Difference]: With dead ends: 134 [2021-02-23 17:57:40,673 INFO L226 Difference]: Without dead ends: 128 [2021-02-23 17:57:40,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=769, Invalid=1487, Unknown=0, NotChecked=0, Total=2256 [2021-02-23 17:57:40,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-02-23 17:57:40,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-02-23 17:57:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2021-02-23 17:57:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2021-02-23 17:57:40,691 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 197 [2021-02-23 17:57:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:57:40,691 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2021-02-23 17:57:40,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-02-23 17:57:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2021-02-23 17:57:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-02-23 17:57:40,693 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:57:40,693 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:57:40,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-23 17:57:40,693 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:57:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:57:40,694 INFO L82 PathProgramCache]: Analyzing trace with hash -346236094, now seen corresponding path program 20 times [2021-02-23 17:57:40,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:57:40,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307564442] [2021-02-23 17:57:40,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:57:40,696 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:57:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:57:40,732 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:57:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:57:40,781 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:57:40,843 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 17:57:40,843 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 17:57:40,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-23 17:57:40,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:57:40 BoogieIcfgContainer [2021-02-23 17:57:40,868 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:57:40,869 INFO L168 Benchmark]: Toolchain (without parser) took 27103.87 ms. Allocated memory was 174.1 MB in the beginning and 629.1 MB in the end (delta: 455.1 MB). Free memory was 156.6 MB in the beginning and 385.9 MB in the end (delta: -229.3 MB). Peak memory consumption was 225.2 MB. Max. memory is 8.0 GB. [2021-02-23 17:57:40,869 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 174.1 MB. Free memory is still 146.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:57:40,870 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.82 ms. Allocated memory is still 174.1 MB. Free memory was 155.6 MB in the beginning and 146.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 17:57:40,870 INFO L168 Benchmark]: Boogie Preprocessor took 36.09 ms. Allocated memory is still 174.1 MB. Free memory was 146.4 MB in the beginning and 145.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:57:40,870 INFO L168 Benchmark]: RCFGBuilder took 446.68 ms. Allocated memory is still 174.1 MB. Free memory was 145.1 MB in the beginning and 145.0 MB in the end (delta: 73.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:57:40,870 INFO L168 Benchmark]: TraceAbstraction took 26272.49 ms. Allocated memory was 174.1 MB in the beginning and 629.1 MB in the end (delta: 455.1 MB). Free memory was 144.7 MB in the beginning and 385.9 MB in the end (delta: -241.2 MB). Peak memory consumption was 214.1 MB. Max. memory is 8.0 GB. [2021-02-23 17:57:40,871 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 146.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 326.82 ms. Allocated memory is still 174.1 MB. Free memory was 155.6 MB in the beginning and 146.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.09 ms. Allocated memory is still 174.1 MB. Free memory was 146.4 MB in the beginning and 145.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 446.68 ms. Allocated memory is still 174.1 MB. Free memory was 145.1 MB in the beginning and 145.0 MB in the end (delta: 73.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 26272.49 ms. Allocated memory was 174.1 MB in the beginning and 629.1 MB in the end (delta: 455.1 MB). Free memory was 144.7 MB in the beginning and 385.9 MB in the end (delta: -241.2 MB). Peak memory consumption was 214.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int a = 20; [L15] int b = 0; [L16] CALL, EXPR sum(a, b) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND TRUE n <= 0 [L7] return m + n; [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 26.1s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 13.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 523 SDtfs, 2171 SDslu, 1215 SDs, 0 SdLazy, 2526 SolverSat, 621 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1000 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 540 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3310 ImplicationChecksByTransitivity, 11.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...