/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:10:46,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:10:46,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:10:47,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-24 04:10:47,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-24 04:10:47,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-24 04:10:47,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-24 04:10:47,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-24 04:10:47,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-24 04:10:47,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-24 04:10:47,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-24 04:10:47,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-24 04:10:47,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:10:47,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:10:47,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:10:47,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:10:47,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:10:47,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:10:47,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:10:47,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:10:47,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:10:47,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:10:47,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:10:47,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:10:47,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:10:47,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:10:47,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:10:47,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:10:47,143 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:10:47,172 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:10:47,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:10:47,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:10:47,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:10:47,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:10:47,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:10:47,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:10:47,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:10:47,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:10:47,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:10:47,180 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:10:47,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:10:47,181 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:10:47,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:10:47,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:10:47,182 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:10:47,182 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:10:47,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:10:47,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:10:47,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:10:47,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:10:47,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:10:47,183 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:10:47,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:10:47,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:10:47,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:10:47,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:10:47,710 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:10:47,711 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:10:47,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2021-02-24 04:10:47,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b7f53660/0808506edd954bf78d40fcfb68bd6643/FLAGb3f75c45d [2021-02-24 04:10:48,580 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:10:48,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2021-02-24 04:10:48,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b7f53660/0808506edd954bf78d40fcfb68bd6643/FLAGb3f75c45d [2021-02-24 04:10:48,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b7f53660/0808506edd954bf78d40fcfb68bd6643 [2021-02-24 04:10:48,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:10:48,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:10:48,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:10:48,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:10:48,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:10:48,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:10:48" (1/1) ... [2021-02-24 04:10:48,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eb5e2f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:10:48, skipping insertion in model container [2021-02-24 04:10:48,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:10:48" (1/1) ... [2021-02-24 04:10:48,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:10:48,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:10:49,202 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/fibo_2calls_4-2.c[946,959] [2021-02-24 04:10:49,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:10:49,220 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:10:49,239 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/fibo_2calls_4-2.c[946,959] [2021-02-24 04:10:49,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:10:49,257 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:10:49,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:10:49 WrapperNode [2021-02-24 04:10:49,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:10:49,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:10:49,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:10:49,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:10:49,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:10:49" (1/1) ... [2021-02-24 04:10:49,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:10:49" (1/1) ... [2021-02-24 04:10:49,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:10:49" (1/1) ... [2021-02-24 04:10:49,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:10:49" (1/1) ... [2021-02-24 04:10:49,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:10:49" (1/1) ... [2021-02-24 04:10:49,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:10:49" (1/1) ... [2021-02-24 04:10:49,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:10:49" (1/1) ... [2021-02-24 04:10:49,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:10:49,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:10:49,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:10:49,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:10:49,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:10:49" (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 [2021-02-24 04:10:49,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:10:49,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:10:49,405 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:10:49,405 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-02-24 04:10:49,406 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-02-24 04:10:49,406 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:10:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:10:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:10:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:10:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:10:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:10:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-02-24 04:10:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-02-24 04:10:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:10:49,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:10:49,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:10:49,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:10:49,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:10:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:10:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:10:49,706 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:10:49,707 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-24 04:10:49,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:10:49 BoogieIcfgContainer [2021-02-24 04:10:49,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:10:49,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:10:49,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:10:49,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:10:49,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:10:48" (1/3) ... [2021-02-24 04:10:49,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32341cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:10:49, skipping insertion in model container [2021-02-24 04:10:49,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:10:49" (2/3) ... [2021-02-24 04:10:49,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32341cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:10:49, skipping insertion in model container [2021-02-24 04:10:49,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:10:49" (3/3) ... [2021-02-24 04:10:49,733 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2021-02-24 04:10:49,749 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:10:49,756 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:10:49,789 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:10:49,888 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:10:49,888 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:10:49,888 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:10:49,890 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:10:49,890 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:10:49,891 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:10:49,891 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:10:49,891 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:10:49,958 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-02-24 04:10:49,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-24 04:10:49,987 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:10:49,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:10:49,990 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:10:50,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:10:50,005 INFO L82 PathProgramCache]: Analyzing trace with hash 2042570277, now seen corresponding path program 1 times [2021-02-24 04:10:50,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:10:50,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570354419] [2021-02-24 04:10:50,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:10:50,128 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:10:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:50,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:50,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:50,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:50,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:50,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:50,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:50,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:50,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:50,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:10:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:50,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:50,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:50,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:10:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:50,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:50,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:50,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:50,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:10:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:10:50,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570354419] [2021-02-24 04:10:50,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:10:50,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:10:50,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154384869] [2021-02-24 04:10:50,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:10:50,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:10:50,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:10:50,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:10:50,523 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 6 states. [2021-02-24 04:10:51,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:10:51,121 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-02-24 04:10:51,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:10:51,124 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-24 04:10:51,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:10:51,138 INFO L225 Difference]: With dead ends: 70 [2021-02-24 04:10:51,138 INFO L226 Difference]: Without dead ends: 50 [2021-02-24 04:10:51,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:10:51,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-24 04:10:51,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-02-24 04:10:51,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-24 04:10:51,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-24 04:10:51,246 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 24 [2021-02-24 04:10:51,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:10:51,246 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-24 04:10:51,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:10:51,247 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-24 04:10:51,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-24 04:10:51,250 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:10:51,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:10:51,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:10:51,252 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:10:51,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:10:51,256 INFO L82 PathProgramCache]: Analyzing trace with hash -589714176, now seen corresponding path program 1 times [2021-02-24 04:10:51,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:10:51,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244309873] [2021-02-24 04:10:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:10:51,278 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:10:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:51,392 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:51,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:51,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:51,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:51,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:51,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:51,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:51,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:51,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:10:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:51,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:51,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:51,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:10:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:51,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:51,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:51,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:51,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:10:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:10:51,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244309873] [2021-02-24 04:10:51,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:10:51,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:10:51,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827297689] [2021-02-24 04:10:51,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:10:51,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:10:51,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:10:51,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:10:51,555 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 6 states. [2021-02-24 04:10:52,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:10:52,060 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-02-24 04:10:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:10:52,064 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2021-02-24 04:10:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:10:52,071 INFO L225 Difference]: With dead ends: 58 [2021-02-24 04:10:52,076 INFO L226 Difference]: Without dead ends: 52 [2021-02-24 04:10:52,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:10:52,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-24 04:10:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-24 04:10:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-24 04:10:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-24 04:10:52,104 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 25 [2021-02-24 04:10:52,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:10:52,104 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-24 04:10:52,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:10:52,104 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-24 04:10:52,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-24 04:10:52,107 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:10:52,107 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:10:52,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:10:52,107 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:10:52,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:10:52,108 INFO L82 PathProgramCache]: Analyzing trace with hash -374229603, now seen corresponding path program 1 times [2021-02-24 04:10:52,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:10:52,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700674946] [2021-02-24 04:10:52,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:10:52,112 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:10:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:52,156 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:52,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:52,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:10:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:52,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:52,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:10:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:52,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,220 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:52,224 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-24 04:10:52,225 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-24 04:10:52,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:10:52,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:52,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:52,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:52,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:52,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,265 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:52,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-24 04:10:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:52,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-24 04:10:52,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700674946] [2021-02-24 04:10:52,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:10:52,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-24 04:10:52,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702705963] [2021-02-24 04:10:52,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 04:10:52,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:10:52,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 04:10:52,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-24 04:10:52,290 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 7 states. [2021-02-24 04:10:52,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:10:52,660 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-02-24 04:10:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:10:52,661 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2021-02-24 04:10:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:10:52,663 INFO L225 Difference]: With dead ends: 90 [2021-02-24 04:10:52,663 INFO L226 Difference]: Without dead ends: 54 [2021-02-24 04:10:52,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-24 04:10:52,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-24 04:10:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-02-24 04:10:52,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-24 04:10:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-02-24 04:10:52,682 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 41 [2021-02-24 04:10:52,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:10:52,682 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-02-24 04:10:52,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 04:10:52,683 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-02-24 04:10:52,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-24 04:10:52,685 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:10:52,685 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:10:52,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:10:52,686 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:10:52,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:10:52,686 INFO L82 PathProgramCache]: Analyzing trace with hash -245289899, now seen corresponding path program 1 times [2021-02-24 04:10:52,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:10:52,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609665908] [2021-02-24 04:10:52,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:10:52,690 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:10:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:52,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:52,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:52,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:52,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:10:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:52,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:52,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:10:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:52,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:52,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:10:52,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:52,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:52,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:52,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,881 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:52,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:10:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:52,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:52,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-24 04:10:52,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609665908] [2021-02-24 04:10:52,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:10:52,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 04:10:52,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36036369] [2021-02-24 04:10:52,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 04:10:52,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:10:52,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 04:10:52,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-24 04:10:52,929 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 9 states. [2021-02-24 04:10:53,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:10:53,428 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2021-02-24 04:10:53,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 04:10:53,429 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2021-02-24 04:10:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:10:53,432 INFO L225 Difference]: With dead ends: 82 [2021-02-24 04:10:53,432 INFO L226 Difference]: Without dead ends: 76 [2021-02-24 04:10:53,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-24 04:10:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-24 04:10:53,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-02-24 04:10:53,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-02-24 04:10:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-02-24 04:10:53,481 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 42 [2021-02-24 04:10:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:10:53,482 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-02-24 04:10:53,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 04:10:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-02-24 04:10:53,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-24 04:10:53,485 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:10:53,485 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:10:53,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:10:53,486 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:10:53,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:10:53,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1853062104, now seen corresponding path program 1 times [2021-02-24 04:10:53,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:10:53,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412771591] [2021-02-24 04:10:53,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:10:53,490 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:10:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:53,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:53,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:53,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:53,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:53,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:10:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:53,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:53,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:53,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:10:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:53,573 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:53,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:53,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:53,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:53,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:53,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:53,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:53,599 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-24 04:10:53,599 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-24 04:10:53,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:53,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:10:53,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:53,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:53,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:53,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:53,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:53,627 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:53,628 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:53,634 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:53,635 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:53,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-24 04:10:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:53,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:53,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:53,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-24 04:10:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:53,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:53,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:53,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-24 04:10:53,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412771591] [2021-02-24 04:10:53,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:10:53,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-24 04:10:53,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793980504] [2021-02-24 04:10:53,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 04:10:53,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:10:53,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 04:10:53,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-24 04:10:53,675 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 7 states. [2021-02-24 04:10:53,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:10:53,947 INFO L93 Difference]: Finished difference Result 138 states and 186 transitions. [2021-02-24 04:10:53,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:10:53,947 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2021-02-24 04:10:53,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:10:53,953 INFO L225 Difference]: With dead ends: 138 [2021-02-24 04:10:53,953 INFO L226 Difference]: Without dead ends: 78 [2021-02-24 04:10:53,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-24 04:10:53,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-24 04:10:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-02-24 04:10:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-24 04:10:53,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2021-02-24 04:10:53,982 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 58 [2021-02-24 04:10:53,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:10:53,983 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2021-02-24 04:10:53,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 04:10:53,983 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2021-02-24 04:10:53,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-24 04:10:53,986 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:10:53,986 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:10:53,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 04:10:53,986 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:10:53,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:10:53,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1662933173, now seen corresponding path program 1 times [2021-02-24 04:10:53,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:10:53,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046756848] [2021-02-24 04:10:53,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:10:53,991 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:10:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:54,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:54,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,019 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:54,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:10:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:54,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:54,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:10:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:54,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:54,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:54,069 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,069 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:54,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:54,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:54,091 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-24 04:10:54,092 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-24 04:10:54,101 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-24 04:10:54,102 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-24 04:10:54,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:54,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:54,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:54,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:10:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:54,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:54,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 04:10:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:54,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:54,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-24 04:10:54,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046756848] [2021-02-24 04:10:54,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:10:54,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 04:10:54,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481523793] [2021-02-24 04:10:54,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 04:10:54,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:10:54,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 04:10:54,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-24 04:10:54,169 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand 9 states. [2021-02-24 04:10:54,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:10:54,595 INFO L93 Difference]: Finished difference Result 150 states and 205 transitions. [2021-02-24 04:10:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 04:10:54,596 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2021-02-24 04:10:54,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:10:54,599 INFO L225 Difference]: With dead ends: 150 [2021-02-24 04:10:54,599 INFO L226 Difference]: Without dead ends: 86 [2021-02-24 04:10:54,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-02-24 04:10:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-02-24 04:10:54,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-02-24 04:10:54,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-02-24 04:10:54,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2021-02-24 04:10:54,628 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 59 [2021-02-24 04:10:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:10:54,629 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2021-02-24 04:10:54,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 04:10:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2021-02-24 04:10:54,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-24 04:10:54,631 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:10:54,631 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:10:54,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 04:10:54,632 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:10:54,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:10:54,633 INFO L82 PathProgramCache]: Analyzing trace with hash -702082707, now seen corresponding path program 1 times [2021-02-24 04:10:54,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:10:54,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470208732] [2021-02-24 04:10:54,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:10:54,636 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:10:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:54,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:54,664 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:54,668 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:54,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:10:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:54,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:54,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:10:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:54,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:54,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:10:54,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:54,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:54,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:54,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:10:54,789 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:54,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:54,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:54,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:54,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:10:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:54,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:54,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 04:10:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:54,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:54,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-24 04:10:54,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470208732] [2021-02-24 04:10:54,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:10:54,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-24 04:10:54,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099079587] [2021-02-24 04:10:54,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-24 04:10:54,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:10:54,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-24 04:10:54,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-02-24 04:10:54,855 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand 11 states. [2021-02-24 04:10:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:10:55,458 INFO L93 Difference]: Finished difference Result 126 states and 166 transitions. [2021-02-24 04:10:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 04:10:55,458 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2021-02-24 04:10:55,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:10:55,461 INFO L225 Difference]: With dead ends: 126 [2021-02-24 04:10:55,461 INFO L226 Difference]: Without dead ends: 120 [2021-02-24 04:10:55,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-02-24 04:10:55,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-02-24 04:10:55,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2021-02-24 04:10:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-02-24 04:10:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 153 transitions. [2021-02-24 04:10:55,508 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 153 transitions. Word has length 60 [2021-02-24 04:10:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:10:55,509 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 153 transitions. [2021-02-24 04:10:55,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-24 04:10:55,509 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 153 transitions. [2021-02-24 04:10:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-02-24 04:10:55,511 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:10:55,511 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:10:55,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-24 04:10:55,512 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:10:55,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:10:55,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1046643654, now seen corresponding path program 1 times [2021-02-24 04:10:55,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:10:55,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359795139] [2021-02-24 04:10:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:10:55,516 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:10:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:55,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:55,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:55,548 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:55,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:55,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:55,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:55,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:10:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:55,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:55,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:55,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:10:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:55,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:55,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:55,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:55,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:55,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:55,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:55,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:55,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:55,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:55,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:55,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:55,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:55,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:55,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:55,640 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-24 04:10:55,641 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-24 04:10:55,650 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-24 04:10:55,651 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-24 04:10:55,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:55,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:55,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:55,676 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:55,677 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:55,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:10:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:55,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:55,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:55,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 04:10:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:55,691 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:55,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:55,692 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:55,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:55,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-02-24 04:10:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:55,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:55,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-02-24 04:10:55,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359795139] [2021-02-24 04:10:55,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:10:55,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-24 04:10:55,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008252305] [2021-02-24 04:10:55,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 04:10:55,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:10:55,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 04:10:55,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:10:55,746 INFO L87 Difference]: Start difference. First operand 114 states and 153 transitions. Second operand 10 states. [2021-02-24 04:10:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:10:56,191 INFO L93 Difference]: Finished difference Result 235 states and 356 transitions. [2021-02-24 04:10:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 04:10:56,191 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2021-02-24 04:10:56,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:10:56,195 INFO L225 Difference]: With dead ends: 235 [2021-02-24 04:10:56,195 INFO L226 Difference]: Without dead ends: 135 [2021-02-24 04:10:56,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-24 04:10:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-02-24 04:10:56,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2021-02-24 04:10:56,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-02-24 04:10:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2021-02-24 04:10:56,265 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 77 [2021-02-24 04:10:56,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:10:56,266 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2021-02-24 04:10:56,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 04:10:56,266 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2021-02-24 04:10:56,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-02-24 04:10:56,271 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:10:56,272 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:10:56,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-24 04:10:56,272 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:10:56,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:10:56,273 INFO L82 PathProgramCache]: Analyzing trace with hash 549553181, now seen corresponding path program 1 times [2021-02-24 04:10:56,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:10:56,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527824220] [2021-02-24 04:10:56,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:10:56,278 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:10:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:56,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:56,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:56,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:56,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:10:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:56,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:56,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:10:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:56,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:56,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:56,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:56,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:56,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:56,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:10:56,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:56,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:56,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:56,436 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-24 04:10:56,437 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-24 04:10:56,450 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-24 04:10:56,450 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-24 04:10:56,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:56,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:56,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:56,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:10:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:56,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:56,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 04:10:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:56,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:56,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-24 04:10:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:56,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:56,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:56,527 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-24 04:10:56,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527824220] [2021-02-24 04:10:56,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:10:56,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-24 04:10:56,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862270196] [2021-02-24 04:10:56,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-24 04:10:56,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:10:56,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-24 04:10:56,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-24 04:10:56,555 INFO L87 Difference]: Start difference. First operand 123 states and 169 transitions. Second operand 13 states. [2021-02-24 04:10:57,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:10:57,165 INFO L93 Difference]: Finished difference Result 265 states and 408 transitions. [2021-02-24 04:10:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-24 04:10:57,165 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2021-02-24 04:10:57,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:10:57,168 INFO L225 Difference]: With dead ends: 265 [2021-02-24 04:10:57,168 INFO L226 Difference]: Without dead ends: 159 [2021-02-24 04:10:57,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-02-24 04:10:57,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-02-24 04:10:57,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 141. [2021-02-24 04:10:57,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-02-24 04:10:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 199 transitions. [2021-02-24 04:10:57,230 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 199 transitions. Word has length 78 [2021-02-24 04:10:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:10:57,231 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 199 transitions. [2021-02-24 04:10:57,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-24 04:10:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 199 transitions. [2021-02-24 04:10:57,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-02-24 04:10:57,234 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:10:57,234 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:10:57,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-24 04:10:57,235 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:10:57,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:10:57,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1728392861, now seen corresponding path program 2 times [2021-02-24 04:10:57,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:10:57,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332021291] [2021-02-24 04:10:57,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:10:57,239 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:10:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:57,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:57,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:57,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,280 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:57,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:10:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:57,305 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,305 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:57,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:10:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:57,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:57,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,331 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:57,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:57,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:57,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:57,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:10:57,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:57,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:57,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:57,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:10:57,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:57,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:57,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:57,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:57,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:10:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:57,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:57,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 04:10:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:57,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:57,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-24 04:10:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:57,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:57,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:10:57,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:57,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:57,526 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,527 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:57,530 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-24 04:10:57,534 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-24 04:10:57,550 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-24 04:10:57,551 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-24 04:10:57,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:10:57,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:10:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:57,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:57,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:10:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:57,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:57,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 04:10:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:10:57,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:10:57,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:10:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-24 04:10:57,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332021291] [2021-02-24 04:10:57,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:10:57,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-24 04:10:57,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449174762] [2021-02-24 04:10:57,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-24 04:10:57,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:10:57,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-24 04:10:57,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-24 04:10:57,634 INFO L87 Difference]: Start difference. First operand 141 states and 199 transitions. Second operand 17 states. [2021-02-24 04:10:58,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:10:58,587 INFO L93 Difference]: Finished difference Result 273 states and 428 transitions. [2021-02-24 04:10:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-24 04:10:58,588 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 113 [2021-02-24 04:10:58,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:10:58,592 INFO L225 Difference]: With dead ends: 273 [2021-02-24 04:10:58,592 INFO L226 Difference]: Without dead ends: 124 [2021-02-24 04:10:58,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-02-24 04:10:58,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-24 04:10:58,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 111. [2021-02-24 04:10:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-02-24 04:10:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 135 transitions. [2021-02-24 04:10:58,622 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 135 transitions. Word has length 113 [2021-02-24 04:10:58,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:10:58,622 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 135 transitions. [2021-02-24 04:10:58,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-24 04:10:58,622 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 135 transitions. [2021-02-24 04:10:58,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-24 04:10:58,624 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:10:58,624 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:10:58,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-24 04:10:58,625 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:10:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:10:58,625 INFO L82 PathProgramCache]: Analyzing trace with hash -645905939, now seen corresponding path program 1 times [2021-02-24 04:10:58,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:10:58,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271618400] [2021-02-24 04:10:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:10:58,628 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:10:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:10:58,645 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:10:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:10:58,658 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:10:58,719 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:10:58,719 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:10:58,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-24 04:10:58,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:10:58 BoogieIcfgContainer [2021-02-24 04:10:58,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:10:58,745 INFO L168 Benchmark]: Toolchain (without parser) took 9826.19 ms. Allocated memory was 160.4 MB in the beginning and 293.6 MB in the end (delta: 133.2 MB). Free memory was 137.4 MB in the beginning and 272.9 MB in the end (delta: -135.5 MB). Peak memory consumption was 167.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:10:58,746 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 160.4 MB. Free memory is still 134.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:10:58,746 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.12 ms. Allocated memory is still 160.4 MB. Free memory was 136.5 MB in the beginning and 127.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:10:58,746 INFO L168 Benchmark]: Boogie Preprocessor took 36.96 ms. Allocated memory is still 160.4 MB. Free memory was 127.0 MB in the beginning and 125.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:10:58,747 INFO L168 Benchmark]: RCFGBuilder took 412.78 ms. Allocated memory is still 160.4 MB. Free memory was 125.4 MB in the beginning and 109.7 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-24 04:10:58,747 INFO L168 Benchmark]: TraceAbstraction took 9030.91 ms. Allocated memory was 160.4 MB in the beginning and 293.6 MB in the end (delta: 133.2 MB). Free memory was 109.2 MB in the beginning and 272.9 MB in the end (delta: -163.7 MB). Peak memory consumption was 139.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:10:58,749 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 160.4 MB. Free memory is still 134.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 322.12 ms. Allocated memory is still 160.4 MB. Free memory was 136.5 MB in the beginning and 127.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.96 ms. Allocated memory is still 160.4 MB. Free memory was 127.0 MB in the beginning and 125.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 412.78 ms. Allocated memory is still 160.4 MB. Free memory was 125.4 MB in the beginning and 109.7 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9030.91 ms. Allocated memory was 160.4 MB in the beginning and 293.6 MB in the end (delta: 133.2 MB). Free memory was 109.2 MB in the beginning and 272.9 MB in the end (delta: -163.7 MB). Peak memory consumption was 139.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 4; [L39] CALL, EXPR fibo1(x) [L10] COND FALSE !(n < 1) [L12] COND FALSE !(n == 1) [L15] CALL, EXPR fibo2(n-1) [L20] COND FALSE !(n < 1) [L22] COND FALSE !(n == 1) [L25] CALL, EXPR fibo1(n-1) [L10] COND FALSE !(n < 1) [L12] COND FALSE !(n == 1) [L15] CALL, EXPR fibo2(n-1) [L20] COND FALSE !(n < 1) [L22] COND TRUE n == 1 [L23] return 1; [L15] RET, EXPR fibo2(n-1) [L15] CALL, EXPR fibo2(n-2) [L20] COND TRUE n < 1 [L21] return 0; [L15] RET, EXPR fibo2(n-2) [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) [L25] CALL, EXPR fibo1(n-2) [L10] COND FALSE !(n < 1) [L12] COND TRUE n == 1 [L13] return 1; [L25] RET, EXPR fibo1(n-2) [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) [L15] CALL, EXPR fibo2(n-2) [L20] COND FALSE !(n < 1) [L22] COND FALSE !(n == 1) [L25] CALL, EXPR fibo1(n-1) [L10] COND FALSE !(n < 1) [L12] COND TRUE n == 1 [L13] return 1; [L25] RET, EXPR fibo1(n-1) [L25] CALL, EXPR fibo1(n-2) [L10] COND TRUE n < 1 [L11] return 0; [L25] RET, EXPR fibo1(n-2) [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 3 [L41] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.8s, OverallIterations: 11, TraceHistogramMax: 6, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 496 SDtfs, 844 SDslu, 836 SDs, 0 SdLazy, 2452 SolverSat, 356 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 296 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 10 MinimizatonAttempts, 61 StatesRemovedByMinimization, 8 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...