/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/eca-rers2012/Problem10_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 01:51:47,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:51:47,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:51:48,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 01:51:48,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 01:51:48,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 01:51:48,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 01:51:48,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 01:51:48,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 01:51:48,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 01:51:48,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 01:51:48,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 01:51:48,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:51:48,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:51:48,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:51:48,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:51:48,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:51:48,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:51:48,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:51:48,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:51:48,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:51:48,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:51:48,111 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:51:48,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:51:48,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 01:51:48,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:51:48,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:51:48,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:51:48,140 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 01:51:48,167 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:51:48,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:51:48,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:51:48,173 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:51:48,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:51:48,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:51:48,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:51:48,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:51:48,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:51:48,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:51:48,175 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:51:48,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:51:48,176 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:51:48,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:51:48,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:51:48,177 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:51:48,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:51:48,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:51:48,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:51:48,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:51:48,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:51:48,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:51:48,178 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:51:48,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:51:48,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:51:48,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:51:48,636 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:51:48,637 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:51:48,638 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label45.c [2020-11-07 01:51:48,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ebb60430/48272deafaf44ff3b6b54cbd52b0871f/FLAG28e2297f9 [2020-11-07 01:51:49,595 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:51:49,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label45.c [2020-11-07 01:51:49,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ebb60430/48272deafaf44ff3b6b54cbd52b0871f/FLAG28e2297f9 [2020-11-07 01:51:49,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ebb60430/48272deafaf44ff3b6b54cbd52b0871f [2020-11-07 01:51:49,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:51:49,735 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:51:49,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:51:49,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:51:49,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:51:49,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:51:49" (1/1) ... [2020-11-07 01:51:49,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37af250d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:49, skipping insertion in model container [2020-11-07 01:51:49,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:51:49" (1/1) ... [2020-11-07 01:51:49,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:51:49,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:51:50,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:51:50,433 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:51:50,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:51:50,737 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:51:50,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:50 WrapperNode [2020-11-07 01:51:50,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:51:50,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:51:50,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:51:50,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:51:50,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:50" (1/1) ... [2020-11-07 01:51:50,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:50" (1/1) ... [2020-11-07 01:51:50,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:50" (1/1) ... [2020-11-07 01:51:50,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:50" (1/1) ... [2020-11-07 01:51:50,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:50" (1/1) ... [2020-11-07 01:51:50,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:50" (1/1) ... [2020-11-07 01:51:50,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:50" (1/1) ... [2020-11-07 01:51:50,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:51:50,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:51:50,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:51:50,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:51:50,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:50" (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 01:51:50,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:51:50,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:51:50,997 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:51:50,997 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-11-07 01:51:50,997 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:51:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-11-07 01:51:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:51:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:51:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:51:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:51:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 01:51:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-07 01:51:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:51:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:51:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:51:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:51:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:51:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:51:51,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:51:52,730 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:51:52,730 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 01:51:52,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:51:52 BoogieIcfgContainer [2020-11-07 01:51:52,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:51:52,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:51:52,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:51:52,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:51:52,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:51:49" (1/3) ... [2020-11-07 01:51:52,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7a3be8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:51:52, skipping insertion in model container [2020-11-07 01:51:52,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:50" (2/3) ... [2020-11-07 01:51:52,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7a3be8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:51:52, skipping insertion in model container [2020-11-07 01:51:52,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:51:52" (3/3) ... [2020-11-07 01:51:52,746 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem10_label45.c [2020-11-07 01:51:52,763 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:51:52,768 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:51:52,781 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:51:52,809 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:51:52,809 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:51:52,810 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:51:52,810 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:51:52,810 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:51:52,810 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:51:52,810 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:51:52,810 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:51:52,843 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states. [2020-11-07 01:51:52,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-07 01:51:52,857 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:51:52,858 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] [2020-11-07 01:51:52,859 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:51:52,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:51:52,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2120148208, now seen corresponding path program 1 times [2020-11-07 01:51:52,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:51:52,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621603624] [2020-11-07 01:51:52,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:51:52,955 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:51:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:51:53,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:51:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:51:53,409 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 01:51:53,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621603624] [2020-11-07 01:51:53,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:51:53,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 01:51:53,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079037178] [2020-11-07 01:51:53,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 01:51:53,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:51:53,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 01:51:53,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 01:51:53,442 INFO L87 Difference]: Start difference. First operand 468 states. Second operand 4 states. [2020-11-07 01:51:56,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:51:56,487 INFO L93 Difference]: Finished difference Result 1102 states and 1528 transitions. [2020-11-07 01:51:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 01:51:56,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-11-07 01:51:56,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:51:56,513 INFO L225 Difference]: With dead ends: 1102 [2020-11-07 01:51:56,513 INFO L226 Difference]: Without dead ends: 584 [2020-11-07 01:51:56,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 01:51:56,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-11-07 01:51:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 554. [2020-11-07 01:51:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-11-07 01:51:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 651 transitions. [2020-11-07 01:51:56,757 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 651 transitions. Word has length 66 [2020-11-07 01:51:56,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:51:56,758 INFO L481 AbstractCegarLoop]: Abstraction has 554 states and 651 transitions. [2020-11-07 01:51:56,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 01:51:56,759 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 651 transitions. [2020-11-07 01:51:56,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 01:51:56,766 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:51:56,766 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-11-07 01:51:56,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:51:56,767 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:51:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:51:56,768 INFO L82 PathProgramCache]: Analyzing trace with hash -2113440394, now seen corresponding path program 1 times [2020-11-07 01:51:56,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:51:56,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184738081] [2020-11-07 01:51:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:51:57,423 WARN L194 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 54 [2020-11-07 01:51:57,616 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-11-07 01:51:58,048 ERROR L275 FreeRefinementEngine]: Caught unknown exception: No quantified variables given [2020-11-07 01:51:58,048 WARN L340 FreeRefinementEngine]: Global settings require throwing the following exception [2020-11-07 01:51:58,049 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: No quantified variables given at de.uni_freiburg.informatik.ultimate.logic.NoopScript.quantifier(NoopScript.java:505) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.quantifier(WrapperScript.java:266) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.quantifier(WrapperScript.java:266) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRCore.checkForAll(FastUPRCore.java:370) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRCore.periodLoop(FastUPRCore.java:179) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRCore.prefixLoop(FastUPRCore.java:154) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRCore.(FastUPRCore.java:145) 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.acceleratedInterpolationCore(AcceleratedInterpolation.java:292) 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 01:51:58,054 INFO L168 Benchmark]: Toolchain (without parser) took 8324.64 ms. Allocated memory was 156.2 MB in the beginning and 188.7 MB in the end (delta: 32.5 MB). Free memory was 137.7 MB in the beginning and 101.2 MB in the end (delta: 36.5 MB). Peak memory consumption was 69.0 MB. Max. memory is 8.0 GB. [2020-11-07 01:51:58,055 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 156.2 MB. Free memory was 130.3 MB in the beginning and 130.2 MB in the end (delta: 77.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 01:51:58,056 INFO L168 Benchmark]: CACSL2BoogieTranslator took 996.32 ms. Allocated memory is still 156.2 MB. Free memory was 137.1 MB in the beginning and 129.1 MB in the end (delta: 8.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-11-07 01:51:58,057 INFO L168 Benchmark]: Boogie Preprocessor took 168.44 ms. Allocated memory is still 156.2 MB. Free memory was 129.1 MB in the beginning and 124.5 MB in the end (delta: 4.6 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-11-07 01:51:58,058 INFO L168 Benchmark]: RCFGBuilder took 1825.71 ms. Allocated memory was 156.2 MB in the beginning and 188.7 MB in the end (delta: 32.5 MB). Free memory was 124.5 MB in the beginning and 136.9 MB in the end (delta: -12.4 MB). Peak memory consumption was 54.6 MB. Max. memory is 8.0 GB. [2020-11-07 01:51:58,059 INFO L168 Benchmark]: TraceAbstraction took 5315.62 ms. Allocated memory is still 188.7 MB. Free memory was 136.9 MB in the beginning and 101.2 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.2 MB. Max. memory is 8.0 GB. [2020-11-07 01:51:58,064 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 156.2 MB. Free memory was 130.3 MB in the beginning and 130.2 MB in the end (delta: 77.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 996.32 ms. Allocated memory is still 156.2 MB. Free memory was 137.1 MB in the beginning and 129.1 MB in the end (delta: 8.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 168.44 ms. Allocated memory is still 156.2 MB. Free memory was 129.1 MB in the beginning and 124.5 MB in the end (delta: 4.6 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1825.71 ms. Allocated memory was 156.2 MB in the beginning and 188.7 MB in the end (delta: 32.5 MB). Free memory was 124.5 MB in the beginning and 136.9 MB in the end (delta: -12.4 MB). Peak memory consumption was 54.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5315.62 ms. Allocated memory is still 188.7 MB. Free memory was 136.9 MB in the beginning and 101.2 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: No quantified variables given de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: No quantified variables given: de.uni_freiburg.informatik.ultimate.logic.NoopScript.quantifier(NoopScript.java:505) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...