/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:51:17,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:51:17,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:51:17,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:51:17,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:51:17,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:51:17,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:51:17,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:51:17,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:51:17,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:51:17,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:51:17,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:51:17,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:51:17,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:51:17,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:51:17,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:51:17,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:51:17,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:51:17,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:51:17,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:51:17,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:51:17,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:51:17,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:51:17,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:51:17,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:51:17,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:51:17,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:51:17,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:51:17,457 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 06:51:17,484 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:51:17,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:51:17,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:51:17,491 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:51:17,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:51:17,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:51:17,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:51:17,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:51:17,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:51:17,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:51:17,495 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:51:17,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:51:17,496 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:51:17,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:51:17,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:51:17,498 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:51:17,498 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:51:17,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:51:17,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:51:17,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:51:17,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:51:17,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:51:17,500 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:51:18,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:51:18,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:51:18,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:51:18,067 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:51:18,067 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:51:18,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2020-11-07 06:51:18,152 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebcd35168/0db16c45c74241538f334dcc560a36b8/FLAG4b3c8f8e7 [2020-11-07 06:51:18,810 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:51:18,811 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps2.c [2020-11-07 06:51:18,820 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebcd35168/0db16c45c74241538f334dcc560a36b8/FLAG4b3c8f8e7 [2020-11-07 06:51:19,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebcd35168/0db16c45c74241538f334dcc560a36b8 [2020-11-07 06:51:19,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:51:19,200 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:51:19,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:51:19,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:51:19,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:51:19,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:51:19" (1/1) ... [2020-11-07 06:51:19,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79bea448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:51:19, skipping insertion in model container [2020-11-07 06:51:19,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:51:19" (1/1) ... [2020-11-07 06:51:19,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:51:19,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:51:19,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:51:19,442 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:51:19,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:51:19,481 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:51:19,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:51:19 WrapperNode [2020-11-07 06:51:19,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:51:19,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:51:19,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:51:19,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:51:19,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:51:19" (1/1) ... [2020-11-07 06:51:19,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:51:19" (1/1) ... [2020-11-07 06:51:19,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:51:19" (1/1) ... [2020-11-07 06:51:19,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:51:19" (1/1) ... [2020-11-07 06:51:19,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:51:19" (1/1) ... [2020-11-07 06:51:19,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:51:19" (1/1) ... [2020-11-07 06:51:19,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:51:19" (1/1) ... [2020-11-07 06:51:19,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:51:19,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:51:19,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:51:19,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:51:19,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:51:19" (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 06:51:19,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:51:19,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:51:19,624 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:51:19,624 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 06:51:19,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:51:19,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:51:19,625 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:51:19,626 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:51:19,626 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:51:19,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:51:19,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:51:19,627 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 06:51:19,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:51:19,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:51:19,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:51:19,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:51:19,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:51:19,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:51:19,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:51:19,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:51:20,154 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:51:20,154 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:51:20,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:51:20 BoogieIcfgContainer [2020-11-07 06:51:20,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:51:20,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:51:20,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:51:20,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:51:20,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:51:19" (1/3) ... [2020-11-07 06:51:20,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22478038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:51:20, skipping insertion in model container [2020-11-07 06:51:20,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:51:19" (2/3) ... [2020-11-07 06:51:20,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22478038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:51:20, skipping insertion in model container [2020-11-07 06:51:20,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:51:20" (3/3) ... [2020-11-07 06:51:20,166 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2.c [2020-11-07 06:51:20,202 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:51:20,206 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:51:20,220 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:51:20,251 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:51:20,251 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:51:20,251 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:51:20,252 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:51:20,252 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:51:20,252 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:51:20,252 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:51:20,252 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:51:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-11-07 06:51:20,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 06:51:20,282 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:51:20,283 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] [2020-11-07 06:51:20,283 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:51:20,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:51:20,290 INFO L82 PathProgramCache]: Analyzing trace with hash 146799458, now seen corresponding path program 1 times [2020-11-07 06:51:20,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:51:20,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823740315] [2020-11-07 06:51:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:51:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:51:20,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:51:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:51:20,663 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 06:51:20,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823740315] [2020-11-07 06:51:20,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:51:20,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:51:20,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643944483] [2020-11-07 06:51:20,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:51:20,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:51:20,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:51:20,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:51:20,702 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 3 states. [2020-11-07 06:51:20,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:51:20,845 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2020-11-07 06:51:20,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:51:20,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-11-07 06:51:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:51:20,858 INFO L225 Difference]: With dead ends: 68 [2020-11-07 06:51:20,858 INFO L226 Difference]: Without dead ends: 42 [2020-11-07 06:51:20,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:51:20,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-07 06:51:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-07 06:51:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-07 06:51:20,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-11-07 06:51:20,926 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 34 [2020-11-07 06:51:20,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:51:20,927 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-11-07 06:51:20,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:51:20,927 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-11-07 06:51:20,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 06:51:20,929 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:51:20,929 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] [2020-11-07 06:51:20,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:51:20,930 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:51:20,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:51:20,931 INFO L82 PathProgramCache]: Analyzing trace with hash -169968245, now seen corresponding path program 1 times [2020-11-07 06:51:20,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:51:20,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134001969] [2020-11-07 06:51:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:51:20,979 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-07 06:51:20,980 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-11-07 06:51:20,983 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 06:51:20,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:51:21,006 WARN L253 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-11-07 06:51:21,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:51:21 BoogieIcfgContainer [2020-11-07 06:51:21,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:51:21,010 INFO L168 Benchmark]: Toolchain (without parser) took 1815.37 ms. Allocated memory is still 151.0 MB. Free memory was 128.1 MB in the beginning and 100.0 MB in the end (delta: 28.1 MB). Peak memory consumption was 29.9 MB. Max. memory is 8.0 GB. [2020-11-07 06:51:21,011 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:51:21,012 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.81 ms. Allocated memory is still 151.0 MB. Free memory was 127.5 MB in the beginning and 118.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:51:21,013 INFO L168 Benchmark]: Boogie Preprocessor took 44.07 ms. Allocated memory is still 151.0 MB. Free memory was 118.1 MB in the beginning and 116.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:51:21,015 INFO L168 Benchmark]: RCFGBuilder took 628.14 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 101.3 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-11-07 06:51:21,016 INFO L168 Benchmark]: TraceAbstraction took 848.82 ms. Allocated memory is still 151.0 MB. Free memory was 100.9 MB in the beginning and 100.0 MB in the end (delta: 895.7 kB). Peak memory consumption was 1.5 MB. Max. memory is 8.0 GB. [2020-11-07 06:51:21,020 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 276.81 ms. Allocated memory is still 151.0 MB. Free memory was 127.5 MB in the beginning and 118.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.07 ms. Allocated memory is still 151.0 MB. Free memory was 118.1 MB in the beginning and 116.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 628.14 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 101.3 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 848.82 ms. Allocated memory is still 151.0 MB. Free memory was 100.9 MB in the beginning and 100.0 MB in the end (delta: 895.7 kB). Peak memory consumption was 1.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L18] int k, y, x, c; [L19] k = __VERIFIER_nondet_int() [L21] y = 0 [L22] x = 0 [L23] c = 0 [L25] COND TRUE 1 [L26] CALL __VERIFIER_assert((y * y) - 2 * x + y == 0) [L10] COND TRUE !(cond) [L12] CALL reach_error() [L3] __assert_fail("0", "ps2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 46 SDtfs, 23 SDslu, 4 SDs, 0 SdLazy, 16 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 2079 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...