/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/phases_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:49:13,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:49:13,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:49:13,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 18:49:13,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 18:49:13,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 18:49:13,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 18:49:13,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 18:49:13,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 18:49:13,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 18:49:13,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 18:49:13,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 18:49:13,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:49:13,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:49:13,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:49:13,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:49:13,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:49:13,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:49:13,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:49:13,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:49:13,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:49:13,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:49:13,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:49:13,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:49:13,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:49:13,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:49:13,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:49:13,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:49:13,247 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:49:13,269 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:49:13,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:49:13,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:49:13,274 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:49:13,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:49:13,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:49:13,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:49:13,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:49:13,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:49:13,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:49:13,276 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:49:13,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:49:13,277 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:49:13,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:49:13,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:49:13,278 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:49:13,278 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:49:13,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:49:13,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:49:13,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:49:13,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:49:13,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:49:13,280 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:49:13,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:49:13,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:49:13,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:49:13,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:49:13,711 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:49:13,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2021-02-23 18:49:13,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7c89b61/7528e403d28f4d16918dbdd27d6885f0/FLAG6b057cc9d [2021-02-23 18:49:14,465 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:49:14,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2021-02-23 18:49:14,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7c89b61/7528e403d28f4d16918dbdd27d6885f0/FLAG6b057cc9d [2021-02-23 18:49:14,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7c89b61/7528e403d28f4d16918dbdd27d6885f0 [2021-02-23 18:49:14,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:49:14,827 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:49:14,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:49:14,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:49:14,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:49:14,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:49:14" (1/1) ... [2021-02-23 18:49:14,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@160bcc78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:14, skipping insertion in model container [2021-02-23 18:49:14,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:49:14" (1/1) ... [2021-02-23 18:49:14,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:49:14,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:49:15,013 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_2-2.c[459,472] [2021-02-23 18:49:15,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:49:15,039 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:49:15,052 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_2-2.c[459,472] [2021-02-23 18:49:15,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:49:15,073 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:49:15,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:15 WrapperNode [2021-02-23 18:49:15,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:49:15,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:49:15,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:49:15,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:49:15,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:15" (1/1) ... [2021-02-23 18:49:15,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:15" (1/1) ... [2021-02-23 18:49:15,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:15" (1/1) ... [2021-02-23 18:49:15,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:15" (1/1) ... [2021-02-23 18:49:15,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:15" (1/1) ... [2021-02-23 18:49:15,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:15" (1/1) ... [2021-02-23 18:49:15,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:15" (1/1) ... [2021-02-23 18:49:15,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:49:15,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:49:15,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:49:15,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:49:15,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:49:15,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:49:15,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:49:15,222 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:49:15,222 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 18:49:15,222 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 18:49:15,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:49:15,222 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:49:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:49:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:49:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:49:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 18:49:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-23 18:49:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 18:49:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:49:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:49:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:49:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:49:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:49:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:49:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:49:15,585 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:49:15,586 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 18:49:15,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:49:15 BoogieIcfgContainer [2021-02-23 18:49:15,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:49:15,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:49:15,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:49:15,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:49:15,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:49:14" (1/3) ... [2021-02-23 18:49:15,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac1442d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:49:15, skipping insertion in model container [2021-02-23 18:49:15,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:15" (2/3) ... [2021-02-23 18:49:15,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac1442d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:49:15, skipping insertion in model container [2021-02-23 18:49:15,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:49:15" (3/3) ... [2021-02-23 18:49:15,627 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_2-2.c [2021-02-23 18:49:15,640 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:49:15,646 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:49:15,669 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:49:15,696 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:49:15,696 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:49:15,697 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:49:15,697 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:49:15,697 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:49:15,697 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:49:15,697 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:49:15,697 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:49:15,713 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2021-02-23 18:49:15,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 18:49:15,723 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:49:15,723 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] [2021-02-23 18:49:15,724 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:49:15,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:49:15,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1523584107, now seen corresponding path program 1 times [2021-02-23 18:49:15,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:49:15,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4789222] [2021-02-23 18:49:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:49:15,829 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:49:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:16,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:16,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:16,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:16,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:16,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:49:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:16,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:16,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:49:16,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4789222] [2021-02-23 18:49:16,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:49:16,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 18:49:16,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347218885] [2021-02-23 18:49:16,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 18:49:16,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:49:16,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 18:49:16,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:49:16,230 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2021-02-23 18:49:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:49:16,331 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-02-23 18:49:16,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 18:49:16,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-02-23 18:49:16,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:49:16,342 INFO L225 Difference]: With dead ends: 46 [2021-02-23 18:49:16,342 INFO L226 Difference]: Without dead ends: 27 [2021-02-23 18:49:16,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:49:16,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-23 18:49:16,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-02-23 18:49:16,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-02-23 18:49:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-02-23 18:49:16,397 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2021-02-23 18:49:16,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:49:16,398 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-02-23 18:49:16,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 18:49:16,398 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-02-23 18:49:16,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 18:49:16,399 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:49:16,400 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] [2021-02-23 18:49:16,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:49:16,400 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:49:16,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:49:16,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1510654813, now seen corresponding path program 1 times [2021-02-23 18:49:16,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:49:16,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990972463] [2021-02-23 18:49:16,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:49:16,405 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:49:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:16,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:16,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:16,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:16,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:49:16,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:16,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:49:16,524 WARN L141 QuantifierPusher]: treesize reduction 3, result has 92.5 percent of original size [2021-02-23 18:49:16,526 WARN L147 QuantifierPusher]: treesize reduction 3, result has 92.5 percent of original size 37 [2021-02-23 18:49:16,567 WARN L141 QuantifierPusher]: treesize reduction 21, result has 77.2 percent of original size [2021-02-23 18:49:16,570 WARN L147 QuantifierPusher]: treesize reduction 21, result has 77.2 percent of original size 71 [2021-02-23 18:49:16,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:16,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:49:16,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:16,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:49:16,641 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:16,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:16,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:49:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:16,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:16,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:49:16,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990972463] [2021-02-23 18:49:16,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:49:16,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 18:49:16,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056104793] [2021-02-23 18:49:16,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 18:49:16,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:49:16,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 18:49:16,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-23 18:49:16,697 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2021-02-23 18:49:16,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:49:16,985 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-02-23 18:49:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 18:49:16,986 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-02-23 18:49:16,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:49:16,987 INFO L225 Difference]: With dead ends: 37 [2021-02-23 18:49:16,987 INFO L226 Difference]: Without dead ends: 32 [2021-02-23 18:49:16,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-02-23 18:49:16,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-02-23 18:49:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-02-23 18:49:16,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-02-23 18:49:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-02-23 18:49:16,999 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2021-02-23 18:49:17,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:49:17,000 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-02-23 18:49:17,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 18:49:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-02-23 18:49:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 18:49:17,001 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:49:17,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:49:17,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:49:17,002 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:49:17,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:49:17,002 INFO L82 PathProgramCache]: Analyzing trace with hash -2050410236, now seen corresponding path program 1 times [2021-02-23 18:49:17,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:49:17,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910044941] [2021-02-23 18:49:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY