/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-8fc6572 [2020-07-10 20:22:42,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-10 20:22:42,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-10 20:22:42,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-10 20:22:42,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-10 20:22:42,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-10 20:22:42,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-10 20:22:42,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-10 20:22:42,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-10 20:22:42,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-10 20:22:42,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-10 20:22:42,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-10 20:22:42,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-10 20:22:42,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-10 20:22:42,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-10 20:22:42,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-10 20:22:42,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-10 20:22:42,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-10 20:22:42,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-10 20:22:42,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-10 20:22:42,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-10 20:22:42,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-10 20:22:42,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-10 20:22:42,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-10 20:22:42,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-10 20:22:42,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-10 20:22:42,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-10 20:22:42,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-10 20:22:42,592 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-10 20:22:42,602 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-10 20:22:42,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-10 20:22:42,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-10 20:22:42,603 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-10 20:22:42,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-10 20:22:42,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-10 20:22:42,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-10 20:22:42,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-10 20:22:42,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-10 20:22:42,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-10 20:22:42,605 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-10 20:22:42,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-10 20:22:42,605 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-10 20:22:42,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-10 20:22:42,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-10 20:22:42,606 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-10 20:22:42,606 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-10 20:22:42,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-10 20:22:42,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-10 20:22:42,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-10 20:22:42,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-10 20:22:42,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-10 20:22:42,607 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-10 20:22:42,886 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-10 20:22:42,902 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-10 20:22:42,906 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-10 20:22:42,907 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-10 20:22:42,907 INFO L275 PluginConnector]: CDTParser initialized [2020-07-10 20:22:42,908 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-07-10 20:22:42,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f3cdadad/6ad248b6510040689f9ff600a333b06b/FLAG55ae3479b [2020-07-10 20:22:43,454 INFO L306 CDTParser]: Found 1 translation units. [2020-07-10 20:22:43,455 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-07-10 20:22:43,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f3cdadad/6ad248b6510040689f9ff600a333b06b/FLAG55ae3479b [2020-07-10 20:22:43,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f3cdadad/6ad248b6510040689f9ff600a333b06b [2020-07-10 20:22:43,836 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-10 20:22:43,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-10 20:22:43,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-10 20:22:43,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-10 20:22:43,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-10 20:22:43,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 08:22:43" (1/1) ... [2020-07-10 20:22:43,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4386dceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:22:43, skipping insertion in model container [2020-07-10 20:22:43,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 08:22:43" (1/1) ... [2020-07-10 20:22:43,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-10 20:22:43,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-10 20:22:44,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 20:22:44,049 INFO L203 MainTranslator]: Completed pre-run [2020-07-10 20:22:44,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 20:22:44,081 INFO L208 MainTranslator]: Completed translation [2020-07-10 20:22:44,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:22:44 WrapperNode [2020-07-10 20:22:44,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-10 20:22:44,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-10 20:22:44,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-10 20:22:44,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-10 20:22:44,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:22:44" (1/1) ... [2020-07-10 20:22:44,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:22:44" (1/1) ... [2020-07-10 20:22:44,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:22:44" (1/1) ... [2020-07-10 20:22:44,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:22:44" (1/1) ... [2020-07-10 20:22:44,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:22:44" (1/1) ... [2020-07-10 20:22:44,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:22:44" (1/1) ... [2020-07-10 20:22:44,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:22:44" (1/1) ... [2020-07-10 20:22:44,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-10 20:22:44,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-10 20:22:44,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-10 20:22:44,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-10 20:22:44,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:22:44" (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 [2020-07-10 20:22:44,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-10 20:22:44,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-10 20:22:44,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-10 20:22:44,269 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-10 20:22:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-10 20:22:44,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-10 20:22:44,270 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-10 20:22:44,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-10 20:22:44,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-10 20:22:44,461 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-10 20:22:44,461 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-10 20:22:44,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 08:22:44 BoogieIcfgContainer [2020-07-10 20:22:44,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-10 20:22:44,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-10 20:22:44,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-10 20:22:44,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-10 20:22:44,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.07 08:22:43" (1/3) ... [2020-07-10 20:22:44,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b961f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 08:22:44, skipping insertion in model container [2020-07-10 20:22:44,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:22:44" (2/3) ... [2020-07-10 20:22:44,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b961f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 08:22:44, skipping insertion in model container [2020-07-10 20:22:44,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 08:22:44" (3/3) ... [2020-07-10 20:22:44,474 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2020-07-10 20:22:44,489 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-10 20:22:44,501 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-10 20:22:44,516 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-10 20:22:44,545 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-10 20:22:44,546 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-10 20:22:44,546 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-10 20:22:44,546 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-10 20:22:44,547 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-10 20:22:44,547 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-10 20:22:44,547 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-10 20:22:44,547 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-10 20:22:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-10 20:22:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-10 20:22:44,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 20:22:44,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 20:22:44,580 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 20:22:44,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 20:22:44,588 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-07-10 20:22:44,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 20:22:44,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818756658] [2020-07-10 20:22:44,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 20:22:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 20:22:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 20:22:44,807 INFO L280 TraceCheckUtils]: 0: Hoare triple {25#true} assume true; {25#true} is VALID [2020-07-10 20:22:44,807 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {25#true} {25#true} #36#return; {25#true} is VALID [2020-07-10 20:22:44,810 INFO L263 TraceCheckUtils]: 0: Hoare triple {25#true} call ULTIMATE.init(); {25#true} is VALID [2020-07-10 20:22:44,811 INFO L280 TraceCheckUtils]: 1: Hoare triple {25#true} assume true; {25#true} is VALID [2020-07-10 20:22:44,811 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {25#true} {25#true} #36#return; {25#true} is VALID [2020-07-10 20:22:44,812 INFO L263 TraceCheckUtils]: 3: Hoare triple {25#true} call #t~ret1 := main(); {25#true} is VALID [2020-07-10 20:22:44,812 INFO L280 TraceCheckUtils]: 4: Hoare triple {25#true} ~x~0 := 0; {25#true} is VALID [2020-07-10 20:22:44,812 INFO L280 TraceCheckUtils]: 5: Hoare triple {25#true} ~y~0 := 1; {25#true} is VALID [2020-07-10 20:22:44,814 INFO L280 TraceCheckUtils]: 6: Hoare triple {25#true} assume !true; {26#false} is VALID [2020-07-10 20:22:44,815 INFO L263 TraceCheckUtils]: 7: Hoare triple {26#false} call __VERIFIER_assert((if 6 == ~x~0 % 4294967296 then 1 else 0)); {26#false} is VALID [2020-07-10 20:22:44,815 INFO L280 TraceCheckUtils]: 8: Hoare triple {26#false} ~cond := #in~cond; {26#false} is VALID [2020-07-10 20:22:44,815 INFO L280 TraceCheckUtils]: 9: Hoare triple {26#false} assume 0 == ~cond; {26#false} is VALID [2020-07-10 20:22:44,816 INFO L280 TraceCheckUtils]: 10: Hoare triple {26#false} assume !false; {26#false} is VALID [2020-07-10 20:22:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-10 20:22:44,817 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-10 20:22:44,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818756658] [2020-07-10 20:22:44,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 20:22:44,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-10 20:22:44,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760623629] [2020-07-10 20:22:44,830 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-10 20:22:44,833 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 20:22:44,837 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states. [2020-07-10 20:22:44,867 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 20:22:44,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-10 20:22:44,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-10 20:22:44,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-10 20:22:44,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-10 20:22:44,881 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-07-10 20:22:44,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 20:22:44,969 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-07-10 20:22:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-10 20:22:44,970 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-10 20:22:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 20:22:44,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-10 20:22:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2020-07-10 20:22:44,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-10 20:22:44,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2020-07-10 20:22:44,989 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states and 36 transitions. [2020-07-10 20:22:45,066 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 36 edges. 36 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 20:22:45,085 INFO L225 Difference]: With dead ends: 33 [2020-07-10 20:22:45,085 INFO L226 Difference]: Without dead ends: 16 [2020-07-10 20:22:45,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-10 20:22:45,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-10 20:22:45,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-10 20:22:45,172 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 20:22:45,173 INFO L82 GeneralOperation]: Start isEquivalent. First operand 16 states. Second operand 16 states. [2020-07-10 20:22:45,174 INFO L74 IsIncluded]: Start isIncluded. First operand 16 states. Second operand 16 states. [2020-07-10 20:22:45,174 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 16 states. [2020-07-10 20:22:45,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 20:22:45,179 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-07-10 20:22:45,179 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-07-10 20:22:45,180 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 20:22:45,180 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 20:22:45,180 INFO L74 IsIncluded]: Start isIncluded. First operand 16 states. Second operand 16 states. [2020-07-10 20:22:45,180 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 16 states. [2020-07-10 20:22:45,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 20:22:45,184 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-07-10 20:22:45,185 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-07-10 20:22:45,185 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 20:22:45,185 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 20:22:45,186 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 20:22:45,186 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 20:22:45,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-10 20:22:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-07-10 20:22:45,190 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-07-10 20:22:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 20:22:45,191 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-07-10 20:22:45,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-10 20:22:45,192 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 16 states and 16 transitions. [2020-07-10 20:22:45,227 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 16 edges. 16 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 20:22:45,227 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-07-10 20:22:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-10 20:22:45,228 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 20:22:45,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 20:22:45,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-10 20:22:45,229 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 20:22:45,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 20:22:45,230 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times [2020-07-10 20:22:45,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 20:22:45,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453828116] [2020-07-10 20:22:45,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 20:22:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 20:22:45,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-10 20:22:45,273 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError at de.uni_freiburg.informatik.ultimate.smtinterpol.proof.FixResolutionProof.fix(FixResolutionProof.java:191) at de.uni_freiburg.informatik.ultimate.smtinterpol.proof.ProofTermGenerator.convert(ProofTermGenerator.java:150) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getProof(SMTInterpol.java:797) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:391) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:385) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:332) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:337) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:239) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:108) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolantsCraigNested(Interpolator.java:146) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolants(Interpolator.java:102) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:266) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-10 20:22:45,280 INFO L168 Benchmark]: Toolchain (without parser) took 1441.40 ms. Allocated memory was 134.2 MB in the beginning and 199.2 MB in the end (delta: 65.0 MB). Free memory was 99.9 MB in the beginning and 120.0 MB in the end (delta: -20.1 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. [2020-07-10 20:22:45,281 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 134.2 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-10 20:22:45,282 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.13 ms. Allocated memory is still 134.2 MB. Free memory was 99.4 MB in the beginning and 90.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-10 20:22:45,283 INFO L168 Benchmark]: Boogie Preprocessor took 38.39 ms. Allocated memory is still 134.2 MB. Free memory was 90.1 MB in the beginning and 88.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-10 20:22:45,284 INFO L168 Benchmark]: RCFGBuilder took 344.76 ms. Allocated memory was 134.2 MB in the beginning and 199.2 MB in the end (delta: 65.0 MB). Free memory was 88.5 MB in the beginning and 164.8 MB in the end (delta: -76.3 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-10 20:22:45,285 INFO L168 Benchmark]: TraceAbstraction took 809.10 ms. Allocated memory is still 199.2 MB. Free memory was 164.8 MB in the beginning and 120.0 MB in the end (delta: 44.8 MB). Peak memory consumption was 44.8 MB. Max. memory is 7.1 GB. [2020-07-10 20:22:45,289 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 134.2 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 243.13 ms. Allocated memory is still 134.2 MB. Free memory was 99.4 MB in the beginning and 90.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.39 ms. Allocated memory is still 134.2 MB. Free memory was 90.1 MB in the beginning and 88.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 344.76 ms. Allocated memory was 134.2 MB in the beginning and 199.2 MB in the end (delta: 65.0 MB). Free memory was 88.5 MB in the beginning and 164.8 MB in the end (delta: -76.3 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 809.10 ms. Allocated memory is still 199.2 MB. Free memory was 164.8 MB in the beginning and 120.0 MB in the end (delta: 44.8 MB). Peak memory consumption was 44.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: null: de.uni_freiburg.informatik.ultimate.smtinterpol.proof.FixResolutionProof.fix(FixResolutionProof.java:191) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...