/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/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 23:05:59,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 23:05:59,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 23:05:59,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 23:05:59,232 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 23:05:59,252 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 23:05:59,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 23:05:59,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 23:05:59,256 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 23:05:59,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 23:05:59,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 23:05:59,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 23:05:59,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 23:05:59,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 23:05:59,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 23:05:59,260 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 23:05:59,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 23:05:59,261 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 23:05:59,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 23:05:59,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 23:05:59,261 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 23:05:59,262 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 23:05:59,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 23:05:59,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:05:59,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 23:05:59,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 23:05:59,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 23:05:59,263 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 23:05:59,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 23:05:59,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 23:05:59,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 23:05:59,720 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 23:05:59,723 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 23:05:59,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2021-02-23 23:05:59,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c25d49fde/7044c76ae1b84772b35f64f078e4e6c3/FLAG2003d8f91 [2021-02-23 23:06:00,417 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 23:06:00,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2021-02-23 23:06:00,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c25d49fde/7044c76ae1b84772b35f64f078e4e6c3/FLAG2003d8f91 [2021-02-23 23:06:00,788 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c25d49fde/7044c76ae1b84772b35f64f078e4e6c3 [2021-02-23 23:06:00,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 23:06:00,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 23:06:00,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 23:06:00,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 23:06:00,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 23:06:00,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:06:00" (1/1) ... [2021-02-23 23:06:00,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71dd3c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:06:00, skipping insertion in model container [2021-02-23 23:06:00,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:06:00" (1/1) ... [2021-02-23 23:06:00,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 23:06:00,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 23:06:01,027 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/test_while_int.i[296,309] [2021-02-23 23:06:01,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:06:01,053 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 23:06:01,066 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/test_while_int.i[296,309] [2021-02-23 23:06:01,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:06:01,085 INFO L208 MainTranslator]: Completed translation [2021-02-23 23:06:01,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:06:01 WrapperNode [2021-02-23 23:06:01,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 23:06:01,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 23:06:01,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 23:06:01,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 23:06:01,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:06:01" (1/1) ... [2021-02-23 23:06:01,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:06:01" (1/1) ... [2021-02-23 23:06:01,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:06:01" (1/1) ... [2021-02-23 23:06:01,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:06:01" (1/1) ... [2021-02-23 23:06:01,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:06:01" (1/1) ... [2021-02-23 23:06:01,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:06:01" (1/1) ... [2021-02-23 23:06:01,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:06:01" (1/1) ... [2021-02-23 23:06:01,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 23:06:01,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 23:06:01,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 23:06:01,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 23:06:01,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:06:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:06:01,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 23:06:01,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 23:06:01,211 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 23:06:01,211 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2021-02-23 23:06:01,211 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2021-02-23 23:06:01,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 23:06:01,212 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 23:06:01,212 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 23:06:01,212 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 23:06:01,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 23:06:01,212 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2021-02-23 23:06:01,212 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2021-02-23 23:06:01,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 23:06:01,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 23:06:01,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 23:06:01,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 23:06:01,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 23:06:01,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 23:06:01,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 23:06:01,461 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 23:06:01,461 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 23:06:01,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:06:01 BoogieIcfgContainer [2021-02-23 23:06:01,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 23:06:01,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 23:06:01,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 23:06:01,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 23:06:01,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:06:00" (1/3) ... [2021-02-23 23:06:01,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9150c35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:06:01, skipping insertion in model container [2021-02-23 23:06:01,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:06:01" (2/3) ... [2021-02-23 23:06:01,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9150c35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:06:01, skipping insertion in model container [2021-02-23 23:06:01,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:06:01" (3/3) ... [2021-02-23 23:06:01,488 INFO L111 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2021-02-23 23:06:01,502 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 23:06:01,514 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 23:06:01,563 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 23:06:01,617 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 23:06:01,618 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 23:06:01,618 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 23:06:01,618 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 23:06:01,618 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 23:06:01,618 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 23:06:01,619 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 23:06:01,619 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 23:06:01,634 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2021-02-23 23:06:01,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 23:06:01,644 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:06:01,645 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] [2021-02-23 23:06:01,645 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:06:01,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:06:01,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1640950537, now seen corresponding path program 1 times [2021-02-23 23:06:01,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:06:01,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297282783] [2021-02-23 23:06:01,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:06:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:06:02,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:06:02,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:06:02,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:06:02,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,069 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:06:02,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:06:02,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:06:02,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:06:02,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:06:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:06:02,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:06:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:06:02,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297282783] [2021-02-23 23:06:02,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:06:02,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 23:06:02,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627162906] [2021-02-23 23:06:02,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 23:06:02,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:06:02,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 23:06:02,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-23 23:06:02,202 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 8 states. [2021-02-23 23:06:02,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:06:02,633 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2021-02-23 23:06:02,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 23:06:02,635 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2021-02-23 23:06:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:06:02,643 INFO L225 Difference]: With dead ends: 62 [2021-02-23 23:06:02,644 INFO L226 Difference]: Without dead ends: 37 [2021-02-23 23:06:02,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-02-23 23:06:02,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-23 23:06:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2021-02-23 23:06:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-23 23:06:02,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-02-23 23:06:02,703 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 22 [2021-02-23 23:06:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:06:02,703 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-02-23 23:06:02,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 23:06:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-02-23 23:06:02,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 23:06:02,705 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:06:02,705 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-23 23:06:02,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 23:06:02,706 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:06:02,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:06:02,707 INFO L82 PathProgramCache]: Analyzing trace with hash 394134961, now seen corresponding path program 1 times [2021-02-23 23:06:02,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:06:02,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88713432] [2021-02-23 23:06:02,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:06:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:06:02,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:06:02,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:06:02,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:06:02,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:06:02,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:06:02,800 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:06:02,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:06:02,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:06:02,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:06:02,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:06:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:06:02,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:06:02,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-23 23:06:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:06:02,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:06:02,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:06:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:06:02,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88713432] [2021-02-23 23:06:02,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:06:02,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-23 23:06:02,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445411604] [2021-02-23 23:06:02,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 23:06:02,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:06:02,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 23:06:02,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-23 23:06:02,951 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 10 states. [2021-02-23 23:06:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:06:03,384 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-02-23 23:06:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 23:06:03,391 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2021-02-23 23:06:03,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:06:03,394 INFO L225 Difference]: With dead ends: 49 [2021-02-23 23:06:03,394 INFO L226 Difference]: Without dead ends: 46 [2021-02-23 23:06:03,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-02-23 23:06:03,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-23 23:06:03,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-02-23 23:06:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-23 23:06:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-02-23 23:06:03,425 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 31 [2021-02-23 23:06:03,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:06:03,426 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-02-23 23:06:03,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 23:06:03,426 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-02-23 23:06:03,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-23 23:06:03,428 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:06:03,428 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:06:03,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 23:06:03,429 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:06:03,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:06:03,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1424275913, now seen corresponding path program 2 times [2021-02-23 23:06:03,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:06:03,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666669773] [2021-02-23 23:06:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:06:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:06:03,495 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:06:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:06:03,532 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:06:03,559 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 23:06:03,560 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 23:06:03,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 23:06:03,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:06:03 BoogieIcfgContainer [2021-02-23 23:06:03,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 23:06:03,600 INFO L168 Benchmark]: Toolchain (without parser) took 2807.23 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.7 MB in the beginning and 72.7 MB in the end (delta: 55.0 MB). Peak memory consumption was 87.0 MB. Max. memory is 8.0 GB. [2021-02-23 23:06:03,601 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 23:06:03,602 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.08 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 117.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-02-23 23:06:03,603 INFO L168 Benchmark]: Boogie Preprocessor took 33.57 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 116.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 23:06:03,603 INFO L168 Benchmark]: RCFGBuilder took 345.37 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 102.7 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-23 23:06:03,604 INFO L168 Benchmark]: TraceAbstraction took 2130.09 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 102.3 MB in the beginning and 72.7 MB in the end (delta: 29.6 MB). Peak memory consumption was 60.7 MB. Max. memory is 8.0 GB. [2021-02-23 23:06:03,608 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.08 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 117.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.57 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 116.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 345.37 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 102.7 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2130.09 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 102.3 MB in the beginning and 72.7 MB in the end (delta: 29.6 MB). Peak memory consumption was 60.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int i=0; VAL [i=0] [L26] COND TRUE i<5 VAL [i=0] [L27] i++ VAL [i=1] [L31] CALL check_error(i!=3) VAL [\old(b)=1] [L20] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L31] RET check_error(i!=3) VAL [i=1] [L26] COND TRUE i<5 VAL [i=1] [L27] i++ VAL [i=2] [L31] CALL check_error(i!=3) VAL [\old(b)=1] [L20] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L31] RET check_error(i!=3) VAL [i=2] [L26] COND TRUE i<5 VAL [i=2] [L27] i++ VAL [i=3] [L31] CALL check_error(i!=3) VAL [\old(b)=0] [L20] (b) ? (0) : __blast_assert () VAL [\old(b)=0, b=0] [L20] CALL __blast_assert () [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 66 SDslu, 183 SDs, 0 SdLazy, 185 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=2, 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, 2 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 51 ConstructedInterpolants, 0 QuantifiedInterpolants, 3987 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/7 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...