/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/id_build.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:07:35,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:07:35,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:07:35,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 02:07:35,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 02:07:35,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 02:07:35,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 02:07:35,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 02:07:35,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 02:07:35,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 02:07:35,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 02:07:35,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 02:07:35,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 02:07:35,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 02:07:35,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 02:07:35,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 02:07:35,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 02:07:35,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 02:07:35,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 02:07:35,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 02:07:35,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 02:07:35,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 02:07:35,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 02:07:35,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 02:07:35,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 02:07:35,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:07:35,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:07:35,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:07:35,816 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 02:07:35,846 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:07:35,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:07:35,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:07:35,853 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:07:35,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:07:35,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:07:35,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:07:35,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:07:35,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:07:35,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:07:35,857 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:07:35,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:07:35,857 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:07:35,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:07:35,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:07:35,858 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:07:35,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:07:35,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:07:35,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:07:35,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:07:35,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:07:35,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:07:35,860 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:07:36,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:07:36,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:07:36,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:07:36,429 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:07:36,430 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:07:36,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i [2020-11-07 02:07:36,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba0700e3/ae78627669c24119a4c75e86a45d43a9/FLAGa64a0229c [2020-11-07 02:07:37,191 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:07:37,192 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build.i [2020-11-07 02:07:37,200 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba0700e3/ae78627669c24119a4c75e86a45d43a9/FLAGa64a0229c [2020-11-07 02:07:37,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba0700e3/ae78627669c24119a4c75e86a45d43a9 [2020-11-07 02:07:37,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:07:37,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:07:37,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:07:37,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:07:37,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:07:37,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:07:37" (1/1) ... [2020-11-07 02:07:37,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131e8e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:37, skipping insertion in model container [2020-11-07 02:07:37,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:07:37" (1/1) ... [2020-11-07 02:07:37,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:07:37,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:07:37,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:07:37,837 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:07:37,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:07:37,880 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:07:37,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:37 WrapperNode [2020-11-07 02:07:37,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:07:37,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:07:37,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:07:37,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:07:37,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:37" (1/1) ... [2020-11-07 02:07:37,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:37" (1/1) ... [2020-11-07 02:07:37,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:37" (1/1) ... [2020-11-07 02:07:37,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:37" (1/1) ... [2020-11-07 02:07:37,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:37" (1/1) ... [2020-11-07 02:07:37,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:37" (1/1) ... [2020-11-07 02:07:37,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:37" (1/1) ... [2020-11-07 02:07:37,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:07:37,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:07:37,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:07:37,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:07:37,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:37" (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 [2020-11-07 02:07:38,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:07:38,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:07:38,114 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:07:38,115 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:07:38,115 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 02:07:38,115 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:07:38,116 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:07:38,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:07:38,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 02:07:38,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 02:07:38,117 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:07:38,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:07:38,118 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:07:38,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:07:38,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 02:07:38,118 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:07:38,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:07:38,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:07:38,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:07:38,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:07:38,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:07:38,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:07:38,805 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:07:38,805 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-07 02:07:38,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:07:38 BoogieIcfgContainer [2020-11-07 02:07:38,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:07:38,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:07:38,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:07:38,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:07:38,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:07:37" (1/3) ... [2020-11-07 02:07:38,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a31df24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:07:38, skipping insertion in model container [2020-11-07 02:07:38,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:37" (2/3) ... [2020-11-07 02:07:38,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a31df24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:07:38, skipping insertion in model container [2020-11-07 02:07:38,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:07:38" (3/3) ... [2020-11-07 02:07:38,825 INFO L111 eAbstractionObserver]: Analyzing ICFG id_build.i [2020-11-07 02:07:38,847 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:07:38,852 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:07:38,871 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:07:38,916 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:07:38,916 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:07:38,917 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:07:38,917 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:07:38,917 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:07:38,917 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:07:38,917 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:07:38,918 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:07:38,942 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-11-07 02:07:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-07 02:07:38,960 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:07:38,962 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] [2020-11-07 02:07:38,963 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:07:38,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:07:38,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1115921713, now seen corresponding path program 1 times [2020-11-07 02:07:38,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:07:38,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501276096] [2020-11-07 02:07:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:07:39,104 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:07:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:39,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:07:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:07:39,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501276096] [2020-11-07 02:07:39,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:07:39,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:07:39,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924928419] [2020-11-07 02:07:39,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:07:39,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:07:39,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:07:39,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:07:39,615 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 6 states. [2020-11-07 02:07:40,045 WARN L194 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-11-07 02:07:40,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:07:40,279 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2020-11-07 02:07:40,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 02:07:40,281 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-11-07 02:07:40,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:07:40,291 INFO L225 Difference]: With dead ends: 75 [2020-11-07 02:07:40,292 INFO L226 Difference]: Without dead ends: 42 [2020-11-07 02:07:40,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 02:07:40,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-07 02:07:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-07 02:07:40,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-07 02:07:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-11-07 02:07:40,364 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 28 [2020-11-07 02:07:40,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:07:40,365 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-11-07 02:07:40,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:07:40,366 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-11-07 02:07:40,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-07 02:07:40,367 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:07:40,368 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:07:40,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:07:40,368 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:07:40,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:07:40,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1724895446, now seen corresponding path program 1 times [2020-11-07 02:07:40,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:07:40,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762809240] [2020-11-07 02:07:40,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:07:40,375 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:07:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:40,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:07:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:40,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-07 02:07:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:07:40,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762809240] [2020-11-07 02:07:40,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:07:40,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:07:40,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671920978] [2020-11-07 02:07:40,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:07:40,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:07:40,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:07:40,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:07:40,580 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 6 states. [2020-11-07 02:07:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:07:41,046 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2020-11-07 02:07:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 02:07:41,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-11-07 02:07:41,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:07:41,053 INFO L225 Difference]: With dead ends: 60 [2020-11-07 02:07:41,054 INFO L226 Difference]: Without dead ends: 56 [2020-11-07 02:07:41,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 02:07:41,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-07 02:07:41,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-11-07 02:07:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-07 02:07:41,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-11-07 02:07:41,120 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 33 [2020-11-07 02:07:41,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:07:41,121 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-11-07 02:07:41,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:07:41,121 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-11-07 02:07:41,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-07 02:07:41,125 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:07:41,126 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:07:41,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:07:41,127 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:07:41,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:07:41,131 INFO L82 PathProgramCache]: Analyzing trace with hash -311170620, now seen corresponding path program 1 times [2020-11-07 02:07:41,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:07:41,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330312770] [2020-11-07 02:07:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:07:41,164 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:07:41,167 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:07:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:41,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:07:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:41,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-11-07 02:07:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:07:41,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330312770] [2020-11-07 02:07:41,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:07:41,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:07:41,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920245586] [2020-11-07 02:07:41,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:07:41,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:07:41,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:07:41,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:07:41,261 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 4 states. [2020-11-07 02:07:41,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:07:41,457 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2020-11-07 02:07:41,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 02:07:41,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-11-07 02:07:41,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:07:41,460 INFO L225 Difference]: With dead ends: 87 [2020-11-07 02:07:41,461 INFO L226 Difference]: Without dead ends: 64 [2020-11-07 02:07:41,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:07:41,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-07 02:07:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2020-11-07 02:07:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-07 02:07:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-11-07 02:07:41,485 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 39 [2020-11-07 02:07:41,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:07:41,486 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-11-07 02:07:41,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:07:41,486 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-11-07 02:07:41,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-07 02:07:41,488 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:07:41,488 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:07:41,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:07:41,489 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:07:41,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:07:41,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2071585797, now seen corresponding path program 1 times [2020-11-07 02:07:41,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:07:41,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337808572] [2020-11-07 02:07:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:07:41,516 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:07:41,520 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:07:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:41,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:07:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:41,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-07 02:07:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:41,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-11-07 02:07:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:41,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-07 02:07:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-07 02:07:41,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337808572] [2020-11-07 02:07:41,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:07:41,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:07:41,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042304202] [2020-11-07 02:07:41,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:07:41,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:07:41,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:07:41,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:07:41,704 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 6 states. [2020-11-07 02:07:42,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:07:42,059 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2020-11-07 02:07:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 02:07:42,060 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-11-07 02:07:42,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:07:42,065 INFO L225 Difference]: With dead ends: 100 [2020-11-07 02:07:42,065 INFO L226 Difference]: Without dead ends: 76 [2020-11-07 02:07:42,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-07 02:07:42,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-07 02:07:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2020-11-07 02:07:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-07 02:07:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2020-11-07 02:07:42,106 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 53 [2020-11-07 02:07:42,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:07:42,109 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2020-11-07 02:07:42,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:07:42,109 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2020-11-07 02:07:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 02:07:42,119 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:07:42,119 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:07:42,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:07:42,120 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:07:42,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:07:42,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1288152954, now seen corresponding path program 2 times [2020-11-07 02:07:42,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:07:42,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495994947] [2020-11-07 02:07:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:07:42,197 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-07 02:07:42,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-07 02:07:42,262 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.icfgtransformer.loopacceleration.fastupr.paraoct.OctagonCalculator.normalizeVarNames(OctagonCalculator.java:153) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRCore.(FastUPRCore.java:133) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.Accelerator.fastUprAcceleration(Accelerator.java:109) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.Accelerator.accelerateLoop(Accelerator.java:89) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.accelerateNestedLoops(AcceleratedInterpolation.java:540) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:275) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:147) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) 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:343) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-07 02:07:42,269 INFO L168 Benchmark]: Toolchain (without parser) took 4698.13 ms. Allocated memory was 153.1 MB in the beginning and 190.8 MB in the end (delta: 37.7 MB). Free memory was 111.2 MB in the beginning and 154.6 MB in the end (delta: -43.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 02:07:42,270 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 153.1 MB. Free memory is still 127.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 02:07:42,271 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.64 ms. Allocated memory is still 153.1 MB. Free memory was 110.4 MB in the beginning and 100.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 02:07:42,272 INFO L168 Benchmark]: Boogie Preprocessor took 79.50 ms. Allocated memory is still 153.1 MB. Free memory was 100.9 MB in the beginning and 137.3 MB in the end (delta: -36.4 MB). Peak memory consumption was 4.8 MB. Max. memory is 8.0 GB. [2020-11-07 02:07:42,273 INFO L168 Benchmark]: RCFGBuilder took 847.55 ms. Allocated memory is still 153.1 MB. Free memory was 137.3 MB in the beginning and 122.7 MB in the end (delta: 14.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-11-07 02:07:42,274 INFO L168 Benchmark]: TraceAbstraction took 3452.30 ms. Allocated memory was 153.1 MB in the beginning and 190.8 MB in the end (delta: 37.7 MB). Free memory was 122.2 MB in the beginning and 154.6 MB in the end (delta: -32.3 MB). Peak memory consumption was 6.9 MB. Max. memory is 8.0 GB. [2020-11-07 02:07:42,279 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 153.1 MB. Free memory is still 127.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 303.64 ms. Allocated memory is still 153.1 MB. Free memory was 110.4 MB in the beginning and 100.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 79.50 ms. Allocated memory is still 153.1 MB. Free memory was 100.9 MB in the beginning and 137.3 MB in the end (delta: -36.4 MB). Peak memory consumption was 4.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 847.55 ms. Allocated memory is still 153.1 MB. Free memory was 137.3 MB in the beginning and 122.7 MB in the end (delta: 14.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3452.30 ms. Allocated memory was 153.1 MB in the beginning and 190.8 MB in the end (delta: 37.7 MB). Free memory was 122.2 MB in the beginning and 154.6 MB in the end (delta: -32.3 MB). Peak memory consumption was 6.9 MB. Max. memory is 8.0 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.icfgtransformer.loopacceleration.fastupr.paraoct.OctagonCalculator.normalizeVarNames(OctagonCalculator.java:153) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...