/usr/bin/java -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/array-fpi/ss1f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 14:53:37,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 14:53:37,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 14:53:37,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 14:53:37,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 14:53:37,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 14:53:37,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 14:53:37,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 14:53:37,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 14:53:37,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 14:53:37,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 14:53:37,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 14:53:37,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 14:53:37,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 14:53:37,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 14:53:37,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 14:53:37,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 14:53:37,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 14:53:37,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 14:53:37,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 14:53:37,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 14:53:37,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 14:53:37,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 14:53:37,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 14:53:37,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 14:53:37,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 14:53:37,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 14:53:37,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 14:53:37,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 14:53:37,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-17 14:53:37,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 14:53:37,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 14:53:37,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 14:53:37,599 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 14:53:37,613 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 14:53:37,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 14:53:37,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 14:53:37,618 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 14:53:37,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 14:53:37,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 14:53:37,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 14:53:37,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 14:53:37,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 14:53:37,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 14:53:37,619 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 14:53:37,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 14:53:37,620 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 14:53:37,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 14:53:37,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 14:53:37,620 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 14:53:37,621 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 14:53:37,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 14:53:37,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 14:53:37,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 14:53:37,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 14:53:37,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 14:53:37,622 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-17 14:53:37,920 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 14:53:37,943 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 14:53:37,946 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 14:53:37,948 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 14:53:37,949 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 14:53:37,950 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ss1f.c [2020-07-17 14:53:38,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/895fd59da/cfe4645c1ac44f1985870b915090313d/FLAG0a6d1aacd [2020-07-17 14:53:38,508 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 14:53:38,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ss1f.c [2020-07-17 14:53:38,516 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/895fd59da/cfe4645c1ac44f1985870b915090313d/FLAG0a6d1aacd [2020-07-17 14:53:38,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/895fd59da/cfe4645c1ac44f1985870b915090313d [2020-07-17 14:53:38,858 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 14:53:38,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 14:53:38,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 14:53:38,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 14:53:38,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 14:53:38,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 02:53:38" (1/1) ... [2020-07-17 14:53:38,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37be9cdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:38, skipping insertion in model container [2020-07-17 14:53:38,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 02:53:38" (1/1) ... [2020-07-17 14:53:38,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 14:53:38,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 14:53:39,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 14:53:39,081 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 14:53:39,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 14:53:39,127 INFO L208 MainTranslator]: Completed translation [2020-07-17 14:53:39,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:39 WrapperNode [2020-07-17 14:53:39,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 14:53:39,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 14:53:39,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 14:53:39,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 14:53:39,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:39" (1/1) ... [2020-07-17 14:53:39,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:39" (1/1) ... [2020-07-17 14:53:39,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:39" (1/1) ... [2020-07-17 14:53:39,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:39" (1/1) ... [2020-07-17 14:53:39,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:39" (1/1) ... [2020-07-17 14:53:39,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:39" (1/1) ... [2020-07-17 14:53:39,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:39" (1/1) ... [2020-07-17 14:53:39,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 14:53:39,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 14:53:39,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 14:53:39,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 14:53:39,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:39" (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 [2020-07-17 14:53:39,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 14:53:39,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 14:53:39,320 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 14:53:39,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 14:53:39,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 14:53:39,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 14:53:39,320 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 14:53:39,320 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 14:53:39,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 14:53:39,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 14:53:39,321 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 14:53:39,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 14:53:39,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 14:53:39,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 14:53:39,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 14:53:39,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 14:53:39,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 14:53:39,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 14:53:39,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 14:53:39,711 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 14:53:39,711 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-17 14:53:39,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 02:53:39 BoogieIcfgContainer [2020-07-17 14:53:39,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 14:53:39,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 14:53:39,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 14:53:39,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 14:53:39,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 02:53:38" (1/3) ... [2020-07-17 14:53:39,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@235630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 02:53:39, skipping insertion in model container [2020-07-17 14:53:39,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:39" (2/3) ... [2020-07-17 14:53:39,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@235630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 02:53:39, skipping insertion in model container [2020-07-17 14:53:39,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 02:53:39" (3/3) ... [2020-07-17 14:53:39,725 INFO L109 eAbstractionObserver]: Analyzing ICFG ss1f.c [2020-07-17 14:53:39,735 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 14:53:39,742 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 14:53:39,754 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 14:53:39,774 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 14:53:39,774 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 14:53:39,774 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-17 14:53:39,774 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 14:53:39,774 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 14:53:39,774 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 14:53:39,775 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 14:53:39,775 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 14:53:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-07-17 14:53:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-17 14:53:39,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:53:39,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:53:39,803 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:53:39,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:53:39,809 INFO L82 PathProgramCache]: Analyzing trace with hash 441507982, now seen corresponding path program 1 times [2020-07-17 14:53:39,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:53:39,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092950242] [2020-07-17 14:53:39,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:53:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:53:40,051 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:53:40,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092950242] [2020-07-17 14:53:40,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:53:40,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 14:53:40,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721092220] [2020-07-17 14:53:40,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 14:53:40,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:53:40,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 14:53:40,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 14:53:40,084 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-07-17 14:53:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:53:40,285 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2020-07-17 14:53:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 14:53:40,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2020-07-17 14:53:40,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:53:40,298 INFO L225 Difference]: With dead ends: 135 [2020-07-17 14:53:40,298 INFO L226 Difference]: Without dead ends: 64 [2020-07-17 14:53:40,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 14:53:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-17 14:53:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-17 14:53:40,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-17 14:53:40,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-07-17 14:53:40,355 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 35 [2020-07-17 14:53:40,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:53:40,355 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-07-17 14:53:40,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 14:53:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-07-17 14:53:40,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-17 14:53:40,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:53:40,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:53:40,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 14:53:40,359 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:53:40,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:53:40,359 INFO L82 PathProgramCache]: Analyzing trace with hash 280562238, now seen corresponding path program 1 times [2020-07-17 14:53:40,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:53:40,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507230721] [2020-07-17 14:53:40,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:53:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:53:40,492 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:53:40,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507230721] [2020-07-17 14:53:40,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:53:40,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 14:53:40,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272382036] [2020-07-17 14:53:40,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 14:53:40,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:53:40,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 14:53:40,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 14:53:40,495 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 5 states. [2020-07-17 14:53:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:53:40,771 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2020-07-17 14:53:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 14:53:40,772 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-07-17 14:53:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:53:40,774 INFO L225 Difference]: With dead ends: 128 [2020-07-17 14:53:40,774 INFO L226 Difference]: Without dead ends: 92 [2020-07-17 14:53:40,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-17 14:53:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-17 14:53:40,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 68. [2020-07-17 14:53:40,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-17 14:53:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-07-17 14:53:40,793 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 35 [2020-07-17 14:53:40,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:53:40,793 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-07-17 14:53:40,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 14:53:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-07-17 14:53:40,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-17 14:53:40,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:53:40,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:53:40,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 14:53:40,797 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:53:40,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:53:40,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1152052174, now seen corresponding path program 1 times [2020-07-17 14:53:40,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:53:40,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147942486] [2020-07-17 14:53:40,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:53:40,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 14:53:40,831 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:458) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:290) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:191) 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) [2020-07-17 14:53:40,837 INFO L168 Benchmark]: Toolchain (without parser) took 1976.41 ms. Allocated memory was 138.4 MB in the beginning and 235.4 MB in the end (delta: 97.0 MB). Free memory was 103.1 MB in the beginning and 196.7 MB in the end (delta: -93.6 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:40,838 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 138.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 14:53:40,839 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.02 ms. Allocated memory is still 138.4 MB. Free memory was 102.7 MB in the beginning and 92.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:40,840 INFO L168 Benchmark]: Boogie Preprocessor took 124.68 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.0 MB in the beginning and 180.4 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:40,841 INFO L168 Benchmark]: RCFGBuilder took 463.63 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 159.3 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:40,842 INFO L168 Benchmark]: TraceAbstraction took 1116.38 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 158.7 MB in the beginning and 196.7 MB in the end (delta: -38.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 14:53:40,846 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 138.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 265.02 ms. Allocated memory is still 138.4 MB. Free memory was 102.7 MB in the beginning and 92.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.68 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.0 MB in the beginning and 180.4 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 463.63 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 159.3 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1116.38 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 158.7 MB in the beginning and 196.7 MB in the end (delta: -38.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:458) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...