/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/terminator_03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:17:02,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:17:03,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:17:03,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:17:03,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:17:03,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:17:03,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:17:03,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:17:03,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:17:03,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:17:03,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:17:03,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:17:03,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:17:03,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:17:03,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:17:03,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:17:03,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:17:03,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:17:03,115 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:17:03,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:17:03,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:17:03,117 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:17:03,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:17:03,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:17:03,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:17:03,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:17:03,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:17:03,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:17:03,120 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:17:03,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:17:03,120 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:17:03,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:17:03,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:17:03,121 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:17:03,121 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:17:03,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:17:03,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:17:03,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:17:03,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:17:03,123 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:17:03,123 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:17:03,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:17:03,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:17:03,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:17:03,534 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:17:03,535 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:17:03,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_03-1.c [2021-02-24 00:17:03,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04b2122e3/d22992a85d9749379b6c7c28be2a3ff9/FLAGc18659488 [2021-02-24 00:17:04,325 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:17:04,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_03-1.c [2021-02-24 00:17:04,334 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04b2122e3/d22992a85d9749379b6c7c28be2a3ff9/FLAGc18659488 [2021-02-24 00:17:04,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04b2122e3/d22992a85d9749379b6c7c28be2a3ff9 [2021-02-24 00:17:04,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:17:04,723 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:17:04,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:17:04,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:17:04,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:17:04,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:17:04" (1/1) ... [2021-02-24 00:17:04,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eb9661c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:04, skipping insertion in model container [2021-02-24 00:17:04,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:17:04" (1/1) ... [2021-02-24 00:17:04,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:17:04,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:17:04,953 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_03-1.c[327,340] [2021-02-24 00:17:04,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:17:04,980 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:17:04,997 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_03-1.c[327,340] [2021-02-24 00:17:05,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:17:05,018 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:17:05,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:05 WrapperNode [2021-02-24 00:17:05,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:17:05,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:17:05,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:17:05,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:17:05,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:05" (1/1) ... [2021-02-24 00:17:05,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:05" (1/1) ... [2021-02-24 00:17:05,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:05" (1/1) ... [2021-02-24 00:17:05,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:05" (1/1) ... [2021-02-24 00:17:05,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:05" (1/1) ... [2021-02-24 00:17:05,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:05" (1/1) ... [2021-02-24 00:17:05,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:05" (1/1) ... [2021-02-24 00:17:05,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:17:05,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:17:05,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:17:05,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:17:05,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:17:05,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:17:05,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:17:05,149 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:17:05,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:17:05,149 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:17:05,150 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:17:05,150 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:17:05,150 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:17:05,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:17:05,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:17:05,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:17:05,151 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:17:05,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:17:05,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:17:05,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:17:05,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:17:05,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:17:05,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:17:05,499 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:17:05,499 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:17:05,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:05 BoogieIcfgContainer [2021-02-24 00:17:05,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:17:05,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:17:05,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:17:05,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:17:05,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:17:04" (1/3) ... [2021-02-24 00:17:05,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20be1029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:05, skipping insertion in model container [2021-02-24 00:17:05,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:05" (2/3) ... [2021-02-24 00:17:05,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20be1029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:05, skipping insertion in model container [2021-02-24 00:17:05,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:05" (3/3) ... [2021-02-24 00:17:05,513 INFO L111 eAbstractionObserver]: Analyzing ICFG terminator_03-1.c [2021-02-24 00:17:05,521 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:17:05,526 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:17:05,549 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:17:05,577 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:17:05,577 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:17:05,577 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:17:05,578 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:17:05,578 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:17:05,578 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:17:05,578 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:17:05,578 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:17:05,595 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2021-02-24 00:17:05,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-24 00:17:05,618 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:05,622 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] [2021-02-24 00:17:05,622 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:05,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:05,637 INFO L82 PathProgramCache]: Analyzing trace with hash -631833344, now seen corresponding path program 1 times [2021-02-24 00:17:05,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:05,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986105975] [2021-02-24 00:17:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:06,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:06,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:06,017 WARN L141 QuantifierPusher]: treesize reduction 24, result has 4.0 percent of original size [2021-02-24 00:17:06,018 WARN L147 QuantifierPusher]: treesize reduction 24, result has 4.0 percent of original size 1 [2021-02-24 00:17:06,023 WARN L141 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size [2021-02-24 00:17:06,039 WARN L147 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size 3 [2021-02-24 00:17:06,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:06,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:06,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:06,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:06,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:06,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:06,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:06,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:06,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:06,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986105975] [2021-02-24 00:17:06,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:06,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 00:17:06,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982607144] [2021-02-24 00:17:06,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 00:17:06,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:06,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 00:17:06,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:17:06,289 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 6 states. [2021-02-24 00:17:06,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:06,806 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-02-24 00:17:06,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 00:17:06,808 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2021-02-24 00:17:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:06,825 INFO L225 Difference]: With dead ends: 54 [2021-02-24 00:17:06,825 INFO L226 Difference]: Without dead ends: 26 [2021-02-24 00:17:06,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:17:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-02-24 00:17:06,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-02-24 00:17:06,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-02-24 00:17:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-02-24 00:17:06,904 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2021-02-24 00:17:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:06,904 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-02-24 00:17:06,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 00:17:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-02-24 00:17:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-24 00:17:06,907 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:06,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:17:06,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:17:06,908 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1424749868, now seen corresponding path program 1 times [2021-02-24 00:17:06,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:06,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685687758] [2021-02-24 00:17:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:17:06,972 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:17:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:17:07,014 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:17:07,058 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:17:07,058 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:17:07,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:17:07,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:17:07 BoogieIcfgContainer [2021-02-24 00:17:07,121 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:17:07,126 INFO L168 Benchmark]: Toolchain (without parser) took 2411.57 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 120.2 MB in the end (delta: 7.3 MB). Peak memory consumption was 7.8 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:07,128 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:17:07,129 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.18 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:07,132 INFO L168 Benchmark]: Boogie Preprocessor took 32.96 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:07,133 INFO L168 Benchmark]: RCFGBuilder took 447.69 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 133.1 MB in the end (delta: -17.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:07,134 INFO L168 Benchmark]: TraceAbstraction took 1616.35 ms. Allocated memory is still 151.0 MB. Free memory was 132.5 MB in the beginning and 120.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:07,145 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 293.18 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.96 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 447.69 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 133.1 MB in the end (delta: -17.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1616.35 ms. Allocated memory is still 151.0 MB. Free memory was 132.5 MB in the beginning and 120.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int x=__VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=100, x=100] [L16] int y=__VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=1, x=100, y=1] [L18] COND TRUE y>0 VAL [x=100, y=1] [L20] COND FALSE !(x<100) VAL [x=100, y=1] [L25] CALL __VERIFIER_assert(y<=0 || (y<0 && x>=100)) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 31 SDslu, 48 SDs, 0 SdLazy, 69 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 1320 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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...