/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/loop-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:48:50,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:48:50,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:48:50,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-24 04:48:50,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-24 04:48:50,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-24 04:48:50,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-24 04:48:50,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-24 04:48:50,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-24 04:48:50,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-24 04:48:50,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-24 04:48:50,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-24 04:48:50,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:48:50,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:48:50,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:48:50,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:48:50,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:48:50,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:48:50,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:48:50,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:48:50,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:48:50,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:48:50,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:48:50,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:48:50,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:48:50,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:48:50,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:48:50,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:48:50,277 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 04:48:50,290 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:48:50,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:48:50,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:48:50,292 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:48:50,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:48:50,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:48:50,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:48:50,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:48:50,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:48:50,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:48:50,294 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:48:50,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:48:50,294 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:48:50,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:48:50,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:48:50,295 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:48:50,296 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:48:50,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:48:50,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:48:50,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:48:50,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:48:50,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:48:50,298 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:48:50,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:48:50,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:48:50,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:48:50,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:48:50,699 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:48:50,699 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:48:50,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2021-02-24 04:48:50,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b920aaa45/37204a9dd81a428ba7a14f7aee4a1d44/FLAG6553f3bc9 [2021-02-24 04:48:51,394 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:48:51,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2021-02-24 04:48:51,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b920aaa45/37204a9dd81a428ba7a14f7aee4a1d44/FLAG6553f3bc9 [2021-02-24 04:48:51,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b920aaa45/37204a9dd81a428ba7a14f7aee4a1d44 [2021-02-24 04:48:51,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:48:51,734 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:48:51,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:48:51,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:48:51,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:48:51,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:48:51" (1/1) ... [2021-02-24 04:48:51,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e0689f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:51, skipping insertion in model container [2021-02-24 04:48:51,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:48:51" (1/1) ... [2021-02-24 04:48:51,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:48:51,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:48:51,923 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-invgen/nested6.i[893,906] [2021-02-24 04:48:51,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:48:51,953 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:48:51,972 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-invgen/nested6.i[893,906] [2021-02-24 04:48:51,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:48:52,012 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:48:52,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:52 WrapperNode [2021-02-24 04:48:52,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:48:52,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:48:52,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:48:52,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:48:52,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:52" (1/1) ... [2021-02-24 04:48:52,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:52" (1/1) ... [2021-02-24 04:48:52,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:52" (1/1) ... [2021-02-24 04:48:52,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:52" (1/1) ... [2021-02-24 04:48:52,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:52" (1/1) ... [2021-02-24 04:48:52,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:52" (1/1) ... [2021-02-24 04:48:52,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:52" (1/1) ... [2021-02-24 04:48:52,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:48:52,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:48:52,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:48:52,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:48:52,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:52" (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 04:48:52,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:48:52,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:48:52,151 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:48:52,151 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 04:48:52,151 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:48:52,152 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:48:52,152 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:48:52,152 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:48:52,152 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 04:48:52,153 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 04:48:52,153 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:48:52,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:48:52,154 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 04:48:52,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:48:52,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:48:52,156 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:48:52,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:48:52,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:48:52,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:48:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:48:52,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:48:52,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:48:52,616 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:48:52,616 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-24 04:48:52,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:48:52 BoogieIcfgContainer [2021-02-24 04:48:52,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:48:52,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:48:52,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:48:52,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:48:52,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:48:51" (1/3) ... [2021-02-24 04:48:52,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f642f0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:48:52, skipping insertion in model container [2021-02-24 04:48:52,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:52" (2/3) ... [2021-02-24 04:48:52,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f642f0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:48:52, skipping insertion in model container [2021-02-24 04:48:52,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:48:52" (3/3) ... [2021-02-24 04:48:52,645 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.i [2021-02-24 04:48:52,653 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:48:52,659 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:48:52,681 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:48:52,708 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:48:52,709 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:48:52,709 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:48:52,709 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:48:52,709 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:48:52,709 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:48:52,709 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:48:52,709 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:48:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2021-02-24 04:48:52,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-24 04:48:52,739 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:52,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:48:52,741 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:52,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:52,748 INFO L82 PathProgramCache]: Analyzing trace with hash -136807662, now seen corresponding path program 1 times [2021-02-24 04:48:52,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:52,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091202575] [2021-02-24 04:48:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:52,841 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:53,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:53,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:53,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:53,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:53,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:53,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:53,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:53,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:53,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:53,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:53,152 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:53,154 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:53,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:53,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:53,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:53,245 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 04:48:53,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091202575] [2021-02-24 04:48:53,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:53,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:48:53,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622921366] [2021-02-24 04:48:53,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:48:53,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:53,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:48:53,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:48:53,273 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 6 states. [2021-02-24 04:48:53,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:53,670 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2021-02-24 04:48:53,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:48:53,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2021-02-24 04:48:53,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:53,687 INFO L225 Difference]: With dead ends: 97 [2021-02-24 04:48:53,687 INFO L226 Difference]: Without dead ends: 55 [2021-02-24 04:48:53,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:48:53,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-02-24 04:48:53,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-02-24 04:48:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-24 04:48:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-02-24 04:48:53,793 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 34 [2021-02-24 04:48:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:53,795 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-02-24 04:48:53,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:48:53,795 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-02-24 04:48:53,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 04:48:53,797 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:53,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:48:53,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:48:53,798 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:53,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1206531044, now seen corresponding path program 1 times [2021-02-24 04:48:53,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:53,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643753866] [2021-02-24 04:48:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:53,803 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:53,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:53,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:53,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:53,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:48:53,877 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:53,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:48:53,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:53,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:53,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:53,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:53,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:53,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:53,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:53,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:53,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:53,941 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 04:48:53,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643753866] [2021-02-24 04:48:53,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:53,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-24 04:48:53,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248312819] [2021-02-24 04:48:53,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 04:48:53,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:53,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 04:48:53,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-24 04:48:53,945 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 7 states. [2021-02-24 04:48:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:54,486 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2021-02-24 04:48:54,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 04:48:54,487 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2021-02-24 04:48:54,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:54,490 INFO L225 Difference]: With dead ends: 97 [2021-02-24 04:48:54,490 INFO L226 Difference]: Without dead ends: 95 [2021-02-24 04:48:54,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-24 04:48:54,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-02-24 04:48:54,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2021-02-24 04:48:54,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-02-24 04:48:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2021-02-24 04:48:54,514 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 36 [2021-02-24 04:48:54,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:54,515 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2021-02-24 04:48:54,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 04:48:54,515 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2021-02-24 04:48:54,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-24 04:48:54,516 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:54,517 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-24 04:48:54,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:48:54,517 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:54,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:54,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2135784643, now seen corresponding path program 1 times [2021-02-24 04:48:54,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:54,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844629771] [2021-02-24 04:48:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:54,521 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:54,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:54,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:54,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:54,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:54,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:54,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:54,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:54,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:54,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:54,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:54,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:54,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:54,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:54,660 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:54,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:54,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 04:48:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:54,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:54,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:54,678 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 04:48:54,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844629771] [2021-02-24 04:48:54,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:54,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:48:54,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723804799] [2021-02-24 04:48:54,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:48:54,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:54,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:48:54,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:48:54,683 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 6 states. [2021-02-24 04:48:54,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:54,973 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2021-02-24 04:48:54,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:48:54,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2021-02-24 04:48:54,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:54,977 INFO L225 Difference]: With dead ends: 93 [2021-02-24 04:48:54,978 INFO L226 Difference]: Without dead ends: 91 [2021-02-24 04:48:54,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:48:54,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-24 04:48:55,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2021-02-24 04:48:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-02-24 04:48:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2021-02-24 04:48:55,002 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 39 [2021-02-24 04:48:55,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:55,003 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2021-02-24 04:48:55,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:48:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2021-02-24 04:48:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-24 04:48:55,005 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:55,005 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:48:55,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:48:55,006 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:55,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:55,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1350553423, now seen corresponding path program 1 times [2021-02-24 04:48:55,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:55,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8328364] [2021-02-24 04:48:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:55,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:55,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:48:55,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:55,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:48:55,072 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-24 04:48:55,089 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-24 04:48:55,094 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:55,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:55,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:55,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-24 04:48:55,104 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-24 04:48:55,110 WARN L141 QuantifierPusher]: treesize reduction 11, result has 73.2 percent of original size [2021-02-24 04:48:55,112 WARN L147 QuantifierPusher]: treesize reduction 11, result has 73.2 percent of original size 30 [2021-02-24 04:48:55,113 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:48:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:48:55,138 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:48:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:48:55,156 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:48:55,201 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:48:55,202 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:48:55,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 04:48:55,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:48:55 BoogieIcfgContainer [2021-02-24 04:48:55,224 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:48:55,226 INFO L168 Benchmark]: Toolchain (without parser) took 3504.51 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.4 MB in the beginning and 86.1 MB in the end (delta: 41.3 MB). Peak memory consumption was 72.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:55,231 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:48:55,233 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.38 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:55,234 INFO L168 Benchmark]: Boogie Preprocessor took 40.75 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:55,237 INFO L168 Benchmark]: RCFGBuilder took 566.35 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 127.6 MB in the end (delta: -12.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:55,242 INFO L168 Benchmark]: TraceAbstraction took 2598.43 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.3 MB in the beginning and 86.1 MB in the end (delta: 41.2 MB). Peak memory consumption was 72.6 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:55,247 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 276.38 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.75 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 566.35 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 127.6 MB in the end (delta: -12.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2598.43 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.3 MB in the beginning and 86.1 MB in the end (delta: 41.2 MB). Peak memory consumption was 72.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int i,j,k,n; [L26] k = __VERIFIER_nondet_int() [L27] n = __VERIFIER_nondet_int() [L28] COND FALSE !(!(n < 1000000)) [L29] COND TRUE k == n [L33] i=0 [L33] COND TRUE i=2*i) [L18] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(k>=2*i) [L36] k++ [L36] COND TRUE k=2*i) [L18] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 68 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 168 SDtfs, 236 SDslu, 156 SDs, 0 SdLazy, 542 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 33 StatesRemovedByMinimization, 2 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...