/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/ldv-regression/test22-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:57:41,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:57:41,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:57:41,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:57:41,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:57:41,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:57:41,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:57:41,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:57:41,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:57:41,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:57:41,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:57:41,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:57:41,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:57:41,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:57:41,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:57:41,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:57:41,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 01:57:41,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 01:57:41,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 01:57:41,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 01:57:41,258 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 01:57:41,282 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:57:41,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:57:41,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:57:41,287 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:57:41,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:57:41,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:57:41,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:57:41,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:57:41,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:57:41,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:57:41,289 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:57:41,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:57:41,290 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:57:41,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:57:41,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:57:41,291 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:57:41,291 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:57:41,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:57:41,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:57:41,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:57:41,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:57:41,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:57:41,292 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:57:41,292 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:57:41,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:57:41,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:57:41,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:57:41,736 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:57:41,737 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:57:41,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test22-2.c [2021-02-22 01:57:41,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50957c60/93cd70c9d5734e41bfb8d24135fa01b2/FLAG856b3b75a [2021-02-22 01:57:42,454 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:57:42,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test22-2.c [2021-02-22 01:57:42,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50957c60/93cd70c9d5734e41bfb8d24135fa01b2/FLAG856b3b75a [2021-02-22 01:57:42,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50957c60/93cd70c9d5734e41bfb8d24135fa01b2 [2021-02-22 01:57:42,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:57:42,496 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:57:42,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:57:42,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:57:42,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:57:42,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:57:42" (1/1) ... [2021-02-22 01:57:42,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1258f94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:42, skipping insertion in model container [2021-02-22 01:57:42,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:57:42" (1/1) ... [2021-02-22 01:57:42,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:57:42,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:57:42,709 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test22-2.c[1029,1042] [2021-02-22 01:57:42,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:57:42,724 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:57:42,745 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test22-2.c[1029,1042] [2021-02-22 01:57:42,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:57:42,765 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:57:42,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:42 WrapperNode [2021-02-22 01:57:42,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:57:42,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:57:42,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:57:42,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:57:42,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:42" (1/1) ... [2021-02-22 01:57:42,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:42" (1/1) ... [2021-02-22 01:57:42,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:42" (1/1) ... [2021-02-22 01:57:42,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:42" (1/1) ... [2021-02-22 01:57:42,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:42" (1/1) ... [2021-02-22 01:57:42,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:42" (1/1) ... [2021-02-22 01:57:42,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:42" (1/1) ... [2021-02-22 01:57:42,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:57:42,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:57:42,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:57:42,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:57:42,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:42" (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 [2021-02-22 01:57:42,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:57:42,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:57:42,914 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:57:42,914 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2021-02-22 01:57:42,914 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2021-02-22 01:57:42,914 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-02-22 01:57:42,915 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:57:42,915 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:57:42,915 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:57:42,915 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:57:42,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:57:42,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 01:57:42,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-22 01:57:42,916 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-22 01:57:42,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:57:42,916 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2021-02-22 01:57:42,917 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-22 01:57:42,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:57:42,917 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:57:42,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:57:42,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:57:42,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:57:42,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:57:43,683 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:57:43,684 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 01:57:43,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:57:43 BoogieIcfgContainer [2021-02-22 01:57:43,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:57:43,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:57:43,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:57:43,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:57:43,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:57:42" (1/3) ... [2021-02-22 01:57:43,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e376c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:57:43, skipping insertion in model container [2021-02-22 01:57:43,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:42" (2/3) ... [2021-02-22 01:57:43,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e376c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:57:43, skipping insertion in model container [2021-02-22 01:57:43,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:57:43" (3/3) ... [2021-02-22 01:57:43,703 INFO L111 eAbstractionObserver]: Analyzing ICFG test22-2.c [2021-02-22 01:57:43,711 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:57:43,717 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:57:43,736 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:57:43,782 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:57:43,782 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:57:43,782 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:57:43,782 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:57:43,783 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:57:43,783 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:57:43,783 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:57:43,783 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:57:43,806 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2021-02-22 01:57:43,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-22 01:57:43,821 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:57:43,822 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2021-02-22 01:57:43,823 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:57:43,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:57:43,830 INFO L82 PathProgramCache]: Analyzing trace with hash -895331749, now seen corresponding path program 1 times [2021-02-22 01:57:43,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:57:43,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262026777] [2021-02-22 01:57:43,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:57:43,919 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:57:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:44,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:44,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:44,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:44,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:44,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:57:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:44,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:44,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:44,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-02-22 01:57:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:44,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:44,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:44,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-02-22 01:57:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:44,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:44,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:44,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-22 01:57:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:44,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:44,366 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:44,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-02-22 01:57:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:44,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:44,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:44,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-02-22 01:57:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:44,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:44,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-02-22 01:57:44,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262026777] [2021-02-22 01:57:44,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:57:44,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:57:44,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677723701] [2021-02-22 01:57:44,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:57:44,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:57:44,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:57:44,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:57:44,451 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 4 states. [2021-02-22 01:57:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:57:44,899 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2021-02-22 01:57:44,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-22 01:57:44,901 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2021-02-22 01:57:44,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:57:44,916 INFO L225 Difference]: With dead ends: 113 [2021-02-22 01:57:44,916 INFO L226 Difference]: Without dead ends: 84 [2021-02-22 01:57:44,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-22 01:57:44,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-02-22 01:57:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-02-22 01:57:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-02-22 01:57:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-02-22 01:57:45,001 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 88 [2021-02-22 01:57:45,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:57:45,003 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-02-22 01:57:45,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:57:45,004 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-02-22 01:57:45,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-22 01:57:45,008 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:57:45,009 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1] [2021-02-22 01:57:45,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:57:45,010 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:57:45,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:57:45,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1230444656, now seen corresponding path program 1 times [2021-02-22 01:57:45,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:57:45,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154563362] [2021-02-22 01:57:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:57:45,015 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:57:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:45,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,153 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:45,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-22 01:57:45,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:45,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:57:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:45,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:45,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-02-22 01:57:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:45,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:45,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-02-22 01:57:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:45,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:45,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-22 01:57:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:45,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:45,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-02-22 01:57:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:45,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:45,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-02-22 01:57:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:45,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-02-22 01:57:45,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154563362] [2021-02-22 01:57:45,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:57:45,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 01:57:45,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862343766] [2021-02-22 01:57:45,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 01:57:45,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:57:45,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 01:57:45,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-22 01:57:45,310 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 5 states. [2021-02-22 01:57:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:57:45,665 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2021-02-22 01:57:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 01:57:45,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2021-02-22 01:57:45,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:57:45,668 INFO L225 Difference]: With dead ends: 111 [2021-02-22 01:57:45,668 INFO L226 Difference]: Without dead ends: 84 [2021-02-22 01:57:45,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-22 01:57:45,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-02-22 01:57:45,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-02-22 01:57:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-02-22 01:57:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-02-22 01:57:45,692 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 90 [2021-02-22 01:57:45,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:57:45,692 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-02-22 01:57:45,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 01:57:45,693 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-02-22 01:57:45,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-02-22 01:57:45,694 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:57:45,695 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1] [2021-02-22 01:57:45,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:57:45,695 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:57:45,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:57:45,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1239221587, now seen corresponding path program 1 times [2021-02-22 01:57:45,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:57:45,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134962312] [2021-02-22 01:57:45,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:57:45,699 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:57:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:45,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:45,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,791 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:57:45,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:57:45,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:57:45,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:57:45,822 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 01:57:45,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:57:45,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 01:57:45,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 01:57:45,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:45,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:57:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:45,915 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:45,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-02-22 01:57:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:45,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,935 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:45,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-02-22 01:57:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:45,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,943 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:45,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:57:45,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:57:45,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-22 01:57:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:45,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:45,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-02-22 01:57:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:45,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:45,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:57:45,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:45,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:57:45,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-02-22 01:57:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:46,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:46,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-02-22 01:57:46,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134962312] [2021-02-22 01:57:46,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:57:46,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-22 01:57:46,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341658162] [2021-02-22 01:57:46,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-22 01:57:46,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:57:46,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-22 01:57:46,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-02-22 01:57:46,022 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 14 states. [2021-02-22 01:57:47,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:57:47,962 INFO L93 Difference]: Finished difference Result 172 states and 183 transitions. [2021-02-22 01:57:47,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-22 01:57:47,963 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 92 [2021-02-22 01:57:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:57:47,968 INFO L225 Difference]: With dead ends: 172 [2021-02-22 01:57:47,968 INFO L226 Difference]: Without dead ends: 158 [2021-02-22 01:57:47,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-02-22 01:57:47,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-22 01:57:48,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 113. [2021-02-22 01:57:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-02-22 01:57:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2021-02-22 01:57:48,010 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 92 [2021-02-22 01:57:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:57:48,011 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2021-02-22 01:57:48,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-22 01:57:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2021-02-22 01:57:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-02-22 01:57:48,013 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:57:48,013 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 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] [2021-02-22 01:57:48,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 01:57:48,014 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:57:48,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:57:48,015 INFO L82 PathProgramCache]: Analyzing trace with hash 353520397, now seen corresponding path program 1 times [2021-02-22 01:57:48,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:57:48,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877745391] [2021-02-22 01:57:48,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:57:48,018 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:57:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:57:48,050 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:57:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:57:48,099 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:57:48,171 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 01:57:48,172 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 01:57:48,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 01:57:48,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:57:48 BoogieIcfgContainer [2021-02-22 01:57:48,201 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:57:48,203 INFO L168 Benchmark]: Toolchain (without parser) took 5717.23 ms. Allocated memory was 177.2 MB in the beginning and 226.5 MB in the end (delta: 49.3 MB). Free memory was 153.0 MB in the beginning and 91.3 MB in the end (delta: 61.7 MB). Peak memory consumption was 112.4 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:48,204 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 177.2 MB. Free memory is still 151.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:57:48,211 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.66 ms. Allocated memory is still 177.2 MB. Free memory was 151.9 MB in the beginning and 142.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:48,212 INFO L168 Benchmark]: Boogie Preprocessor took 43.94 ms. Allocated memory is still 177.2 MB. Free memory was 142.0 MB in the beginning and 140.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:48,213 INFO L168 Benchmark]: RCFGBuilder took 875.31 ms. Allocated memory is still 177.2 MB. Free memory was 140.0 MB in the beginning and 152.4 MB in the end (delta: -12.4 MB). Peak memory consumption was 19.3 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:48,218 INFO L168 Benchmark]: TraceAbstraction took 4509.40 ms. Allocated memory was 177.2 MB in the beginning and 226.5 MB in the end (delta: 49.3 MB). Free memory was 151.9 MB in the beginning and 91.3 MB in the end (delta: 60.6 MB). Peak memory consumption was 110.9 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:48,226 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 177.2 MB. Free memory is still 151.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 268.66 ms. Allocated memory is still 177.2 MB. Free memory was 151.9 MB in the beginning and 142.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.94 ms. Allocated memory is still 177.2 MB. Free memory was 142.0 MB in the beginning and 140.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 875.31 ms. Allocated memory is still 177.2 MB. Free memory was 140.0 MB in the beginning and 152.4 MB in the end (delta: -12.4 MB). Peak memory consumption was 19.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4509.40 ms. Allocated memory was 177.2 MB in the beginning and 226.5 MB in the end (delta: 49.3 MB). Free memory was 151.9 MB in the beginning and 91.3 MB in the end (delta: 60.6 MB). Peak memory consumption was 110.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 50]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L11] struct dummy d1, d2; [L34] CALL init() [L15] d1.a = __VERIFIER_nondet_int() [L16] d1.b = __VERIFIER_nondet_int() [L18] d2.a = __VERIFIER_nondet_int() [L19] d2.b = __VERIFIER_nondet_int() [L34] RET init() [L35] CALL, EXPR get_dummy() [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L35] RET, EXPR get_dummy() [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L35] CALL, EXPR get_dummy() [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L35] RET, EXPR get_dummy() [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L35] CALL, EXPR get_dummy() [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L35] RET, EXPR get_dummy() [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L36] int i = __VERIFIER_nondet_int(); [L37] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L37] EXPR (*pd2).a [L37] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L37] COND TRUE pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L38] int *pa = &pd1->a; [L39] EXPR pd3->a [L39] i = pd3->a - 10 [L40] EXPR \read(*pa) [L40] COND FALSE !(i < *pa) [L43] CALL, EXPR check(pd2, i) [L29] EXPR s1->a [L29] return s1->a == i; [L43] RET, EXPR check(pd2, i) [L43] COND TRUE !check(pd2, i) [L50] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 97 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.3s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 214 SDtfs, 415 SDslu, 76 SDs, 0 SdLazy, 1311 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred 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, 45 StatesRemovedByMinimization, 1 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...