/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/array-fpi/s1iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:20:18,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:20:18,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:20:18,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:20:18,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:20:18,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:20:18,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:20:18,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:20:18,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:20:18,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:20:18,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:20:18,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:20:18,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:20:18,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:20:18,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:20:18,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:20:18,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:20:18,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:20:18,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:20:18,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:20:18,743 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 02:20:18,785 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:20:18,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:20:18,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:20:18,792 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:20:18,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:20:18,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:20:18,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:20:18,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:20:18,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:20:18,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:20:18,794 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:20:18,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:20:18,795 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:20:18,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:20:18,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:20:18,796 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:20:18,796 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:20:18,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:20:18,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:20:18,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:20:18,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:20:18,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:20:18,798 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:20:18,798 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:20:19,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:20:19,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:20:19,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:20:19,251 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:20:19,252 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:20:19,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1iff.c [2021-02-22 02:20:19,343 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa1d820d0/905adeac91924a479e8689164f5f98db/FLAG25c7e2286 [2021-02-22 02:20:20,003 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:20:20,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1iff.c [2021-02-22 02:20:20,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa1d820d0/905adeac91924a479e8689164f5f98db/FLAG25c7e2286 [2021-02-22 02:20:20,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa1d820d0/905adeac91924a479e8689164f5f98db [2021-02-22 02:20:20,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:20:20,376 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:20:20,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:20,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:20:20,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:20:20,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:20" (1/1) ... [2021-02-22 02:20:20,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@478ab96c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:20, skipping insertion in model container [2021-02-22 02:20:20,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:20" (1/1) ... [2021-02-22 02:20:20,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:20:20,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:20:20,572 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1iff.c[588,601] [2021-02-22 02:20:20,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:20,606 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:20:20,623 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1iff.c[588,601] [2021-02-22 02:20:20,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:20,680 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:20:20,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:20 WrapperNode [2021-02-22 02:20:20,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:20,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:20:20,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:20:20,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:20:20,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:20" (1/1) ... [2021-02-22 02:20:20,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:20" (1/1) ... [2021-02-22 02:20:20,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:20" (1/1) ... [2021-02-22 02:20:20,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:20" (1/1) ... [2021-02-22 02:20:20,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:20" (1/1) ... [2021-02-22 02:20:20,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:20" (1/1) ... [2021-02-22 02:20:20,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:20" (1/1) ... [2021-02-22 02:20:20,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:20:20,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:20:20,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:20:20,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:20:20,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:20" (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 02:20:20,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:20:20,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:20:20,902 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:20:20,903 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:20:20,903 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:20:20,903 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:20:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:20:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:20:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:20:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:20:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:20:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:20:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:20:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-22 02:20:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:20:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-22 02:20:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:20:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:20:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:20:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:20:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:20:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:20:21,537 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:20:21,538 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-22 02:20:21,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:21 BoogieIcfgContainer [2021-02-22 02:20:21,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:20:21,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:20:21,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:20:21,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:20:21,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:20:20" (1/3) ... [2021-02-22 02:20:21,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186bd326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:21, skipping insertion in model container [2021-02-22 02:20:21,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:20" (2/3) ... [2021-02-22 02:20:21,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186bd326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:21, skipping insertion in model container [2021-02-22 02:20:21,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:21" (3/3) ... [2021-02-22 02:20:21,552 INFO L111 eAbstractionObserver]: Analyzing ICFG s1iff.c [2021-02-22 02:20:21,559 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:20:21,565 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:20:21,585 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:20:21,612 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:20:21,612 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:20:21,613 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:20:21,613 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:20:21,613 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:20:21,613 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:20:21,613 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:20:21,613 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:20:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2021-02-22 02:20:21,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-22 02:20:21,640 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:21,641 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] [2021-02-22 02:20:21,641 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:21,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:21,648 INFO L82 PathProgramCache]: Analyzing trace with hash 137751759, now seen corresponding path program 1 times [2021-02-22 02:20:21,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:21,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051665673] [2021-02-22 02:20:21,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:21,730 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:21,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:21,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:21,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:21,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:21,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:22,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:22,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:22,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:20:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:22,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:22,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:22,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051665673] [2021-02-22 02:20:22,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:22,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:20:22,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105805113] [2021-02-22 02:20:22,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:20:22,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:22,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:20:22,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:20:22,066 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2021-02-22 02:20:22,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:22,262 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2021-02-22 02:20:22,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:20:22,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2021-02-22 02:20:22,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:22,273 INFO L225 Difference]: With dead ends: 119 [2021-02-22 02:20:22,274 INFO L226 Difference]: Without dead ends: 58 [2021-02-22 02:20:22,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:20:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-22 02:20:22,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-02-22 02:20:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-22 02:20:22,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-02-22 02:20:22,339 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 36 [2021-02-22 02:20:22,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:22,342 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-02-22 02:20:22,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:20:22,342 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-02-22 02:20:22,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-22 02:20:22,344 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:22,344 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] [2021-02-22 02:20:22,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:20:22,345 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:22,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:22,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1632327928, now seen corresponding path program 1 times [2021-02-22 02:20:22,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:22,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989796347] [2021-02-22 02:20:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:22,353 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:22,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:22,489 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:22,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:22,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:20:22,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:22,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:20:22,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:22,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:22,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:22,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:22,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:22,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:20:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:22,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:22,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:22,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989796347] [2021-02-22 02:20:22,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:22,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 02:20:22,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262181803] [2021-02-22 02:20:22,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 02:20:22,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:22,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 02:20:22,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:20:22,575 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 5 states. [2021-02-22 02:20:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:22,807 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2021-02-22 02:20:22,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 02:20:22,811 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2021-02-22 02:20:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:22,813 INFO L225 Difference]: With dead ends: 104 [2021-02-22 02:20:22,813 INFO L226 Difference]: Without dead ends: 79 [2021-02-22 02:20:22,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-22 02:20:22,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-22 02:20:22,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2021-02-22 02:20:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-22 02:20:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-02-22 02:20:22,855 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 36 [2021-02-22 02:20:22,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:22,856 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-02-22 02:20:22,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 02:20:22,856 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-02-22 02:20:22,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-22 02:20:22,858 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:22,859 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:20:22,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:20:22,859 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:22,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:22,860 INFO L82 PathProgramCache]: Analyzing trace with hash -881259695, now seen corresponding path program 1 times [2021-02-22 02:20:22,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:22,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857060383] [2021-02-22 02:20:22,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:22,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:22,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:20:22,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:22,907 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:20:22,915 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:20:22,931 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:20:22,936 WARN L141 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size [2021-02-22 02:20:22,939 WARN L147 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size 30 [2021-02-22 02:20:22,940 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:20:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:23,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:23,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:20:23,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-22 02:20:23,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-22 02:20:23,111 WARN L141 QuantifierPusher]: treesize reduction 6, result has 75.0 percent of original size [2021-02-22 02:20:23,112 WARN L147 QuantifierPusher]: treesize reduction 6, result has 75.0 percent of original size 18 [2021-02-22 02:20:23,131 WARN L141 QuantifierPusher]: treesize reduction 15, result has 59.5 percent of original size [2021-02-22 02:20:23,133 WARN L147 QuantifierPusher]: treesize reduction 15, result has 59.5 percent of original size 22 [2021-02-22 02:20:23,158 WARN L141 QuantifierPusher]: treesize reduction 16, result has 68.0 percent of original size [2021-02-22 02:20:23,160 WARN L147 QuantifierPusher]: treesize reduction 16, result has 68.0 percent of original size 34 [2021-02-22 02:20:23,201 WARN L141 QuantifierPusher]: treesize reduction 16, result has 73.8 percent of original size [2021-02-22 02:20:23,203 WARN L147 QuantifierPusher]: treesize reduction 16, result has 73.8 percent of original size 45 [2021-02-22 02:20:23,260 WARN L141 QuantifierPusher]: treesize reduction 16, result has 73.8 percent of original size [2021-02-22 02:20:23,263 WARN L147 QuantifierPusher]: treesize reduction 16, result has 73.8 percent of original size 45 [2021-02-22 02:20:23,350 WARN L141 QuantifierPusher]: treesize reduction 30, result has 57.7 percent of original size [2021-02-22 02:20:23,353 WARN L147 QuantifierPusher]: treesize reduction 30, result has 57.7 percent of original size 41 [2021-02-22 02:20:23,401 WARN L141 QuantifierPusher]: treesize reduction 39, result has 50.6 percent of original size [2021-02-22 02:20:23,404 WARN L147 QuantifierPusher]: treesize reduction 39, result has 50.6 percent of original size 40 [2021-02-22 02:20:23,459 WARN L141 QuantifierPusher]: treesize reduction 16, result has 69.2 percent of original size [2021-02-22 02:20:23,461 WARN L147 QuantifierPusher]: treesize reduction 16, result has 69.2 percent of original size 36 [2021-02-22 02:20:23,506 WARN L141 QuantifierPusher]: treesize reduction 9, result has 78.0 percent of original size [2021-02-22 02:20:23,508 WARN L147 QuantifierPusher]: treesize reduction 9, result has 78.0 percent of original size 32 [2021-02-22 02:20:23,556 WARN L141 QuantifierPusher]: treesize reduction 12, result has 75.0 percent of original size [2021-02-22 02:20:23,558 WARN L147 QuantifierPusher]: treesize reduction 12, result has 75.0 percent of original size 36 [2021-02-22 02:20:23,609 WARN L141 QuantifierPusher]: treesize reduction 13, result has 71.1 percent of original size [2021-02-22 02:20:23,611 WARN L147 QuantifierPusher]: treesize reduction 13, result has 71.1 percent of original size 32 [2021-02-22 02:20:23,648 WARN L141 QuantifierPusher]: treesize reduction 13, result has 68.3 percent of original size [2021-02-22 02:20:23,649 WARN L147 QuantifierPusher]: treesize reduction 13, result has 68.3 percent of original size 28 [2021-02-22 02:20:23,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:20:23,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:20:23,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,714 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:23,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:23,774 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:23,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:20:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:23,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:23,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:23,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:20:23,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-22 02:20:23,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:23,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:20:23,905 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-02-22 02:20:23,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:23,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:23,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-02-22 02:20:23,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-02-22 02:20:24,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:24,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-02-22 02:20:24,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-02-22 02:20:24,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:24,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-02-22 02:20:24,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-02-22 02:20:24,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:24,191 WARN L141 QuantifierPusher]: treesize reduction 2, result has 96.0 percent of original size [2021-02-22 02:20:24,192 WARN L147 QuantifierPusher]: treesize reduction 2, result has 96.0 percent of original size 48 [2021-02-22 02:20:24,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-02-22 02:20:24,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:24,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:24,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857060383] [2021-02-22 02:20:24,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:24,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-02-22 02:20:24,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346495855] [2021-02-22 02:20:24,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-22 02:20:24,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:24,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-22 02:20:24,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=523, Unknown=26, NotChecked=0, Total=650 [2021-02-22 02:20:24,283 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 24 states. [2021-02-22 02:20:26,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:26,763 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2021-02-22 02:20:26,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-22 02:20:26,764 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2021-02-22 02:20:26,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:26,768 INFO L225 Difference]: With dead ends: 135 [2021-02-22 02:20:26,768 INFO L226 Difference]: Without dead ends: 125 [2021-02-22 02:20:26,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=330, Invalid=1791, Unknown=41, NotChecked=0, Total=2162 [2021-02-22 02:20:26,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-02-22 02:20:26,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 78. [2021-02-22 02:20:26,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-22 02:20:26,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-02-22 02:20:26,795 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 53 [2021-02-22 02:20:26,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:26,796 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-02-22 02:20:26,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-02-22 02:20:26,796 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-02-22 02:20:26,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-22 02:20:26,799 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:26,799 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:20:26,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 02:20:26,799 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:26,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:26,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1439750208, now seen corresponding path program 2 times [2021-02-22 02:20:26,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:26,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413549534] [2021-02-22 02:20:26,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:26,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:26,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:20:26,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:26,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:20:26,816 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:20:26,818 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:20:26,821 WARN L141 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size [2021-02-22 02:20:26,823 WARN L147 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size 30 [2021-02-22 02:20:26,824 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:20:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:20:26,875 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:20:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:20:26,930 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:20:26,969 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:20:26,969 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:20:26,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 02:20:26,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:20:26 BoogieIcfgContainer [2021-02-22 02:20:26,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:20:26,993 INFO L168 Benchmark]: Toolchain (without parser) took 6628.97 ms. Allocated memory was 163.6 MB in the beginning and 206.6 MB in the end (delta: 43.0 MB). Free memory was 139.8 MB in the beginning and 179.7 MB in the end (delta: -40.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:26,994 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 163.6 MB. Free memory is still 147.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:20:26,994 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.60 ms. Allocated memory is still 163.6 MB. Free memory was 138.7 MB in the beginning and 128.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:26,995 INFO L168 Benchmark]: Boogie Preprocessor took 87.30 ms. Allocated memory is still 163.6 MB. Free memory was 128.2 MB in the beginning and 126.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:26,996 INFO L168 Benchmark]: RCFGBuilder took 769.10 ms. Allocated memory is still 163.6 MB. Free memory was 126.5 MB in the beginning and 134.8 MB in the end (delta: -8.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:26,997 INFO L168 Benchmark]: TraceAbstraction took 5447.95 ms. Allocated memory was 163.6 MB in the beginning and 206.6 MB in the end (delta: 43.0 MB). Free memory was 134.5 MB in the beginning and 179.7 MB in the end (delta: -45.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:20:27,000 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 163.6 MB. Free memory is still 147.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 303.60 ms. Allocated memory is still 163.6 MB. Free memory was 138.7 MB in the beginning and 128.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 87.30 ms. Allocated memory is still 163.6 MB. Free memory was 128.2 MB in the beginning and 126.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 769.10 ms. Allocated memory is still 163.6 MB. Free memory was 126.5 MB in the beginning and 134.8 MB in the end (delta: -8.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5447.95 ms. Allocated memory was 163.6 MB in the beginning and 206.6 MB in the end (delta: 43.0 MB). Free memory was 134.5 MB in the beginning and 179.7 MB in the end (delta: -45.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 [L32] COND TRUE i