/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:46:01,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:46:01,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:46:01,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:46:01,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:46:01,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:46:01,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:46:01,471 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:46:01,501 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:46:01,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:46:01,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:46:01,505 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:46:01,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:46:01,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:46:01,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:46:01,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:46:01,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:46:01,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:46:01,506 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:46:01,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:46:01,506 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:46:01,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:46:01,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:46:01,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:46:01,507 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:46:01,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:46:01,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:46:01,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:46:01,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:46:01,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:46:01,508 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:46:01,508 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:46:01,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:46:01,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:46:01,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:46:01,871 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:46:01,871 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:46:01,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-05-03 00:46:01,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7fd4dab7/7b8cb19f7a384529a403e109019dabc1/FLAG5d8c1c8a4 [2021-05-03 00:46:02,391 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:46:02,391 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-05-03 00:46:02,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7fd4dab7/7b8cb19f7a384529a403e109019dabc1/FLAG5d8c1c8a4 [2021-05-03 00:46:02,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7fd4dab7/7b8cb19f7a384529a403e109019dabc1 [2021-05-03 00:46:02,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:46:02,419 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:46:02,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:46:02,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:46:02,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:46:02,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:46:02" (1/1) ... [2021-05-03 00:46:02,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@620db0b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:46:02, skipping insertion in model container [2021-05-03 00:46:02,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:46:02" (1/1) ... [2021-05-03 00:46:02,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:46:02,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:46:02,554 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2021-05-03 00:46:02,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:46:02,580 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:46:02,589 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2021-05-03 00:46:02,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:46:02,614 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:46:02,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:46:02 WrapperNode [2021-05-03 00:46:02,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:46:02,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:46:02,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:46:02,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:46:02,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:46:02" (1/1) ... [2021-05-03 00:46:02,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:46:02" (1/1) ... [2021-05-03 00:46:02,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:46:02" (1/1) ... [2021-05-03 00:46:02,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:46:02" (1/1) ... [2021-05-03 00:46:02,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:46:02" (1/1) ... [2021-05-03 00:46:02,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:46:02" (1/1) ... [2021-05-03 00:46:02,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:46:02" (1/1) ... [2021-05-03 00:46:02,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:46:02,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:46:02,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:46:02,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:46:02,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:46:02" (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 [2021-05-03 00:46:02,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:46:02,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:46:02,772 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:46:02,772 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:46:02,772 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:46:02,772 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:46:02,772 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:46:02,772 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:46:02,773 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:46:02,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:46:02,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-03 00:46:02,773 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:46:02,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:46:02,773 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:46:02,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:46:02,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:46:02,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:46:02,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:46:02,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:46:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:46:03,010 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:46:03,010 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:46:03,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:46:03 BoogieIcfgContainer [2021-05-03 00:46:03,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:46:03,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:46:03,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:46:03,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:46:03,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:46:02" (1/3) ... [2021-05-03 00:46:03,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33daa583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:46:03, skipping insertion in model container [2021-05-03 00:46:03,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:46:02" (2/3) ... [2021-05-03 00:46:03,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33daa583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:46:03, skipping insertion in model container [2021-05-03 00:46:03,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:46:03" (3/3) ... [2021-05-03 00:46:03,017 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound10.c [2021-05-03 00:46:03,021 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:46:03,024 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:46:03,044 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:46:03,079 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:46:03,079 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:46:03,080 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:46:03,080 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:46:03,080 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:46:03,080 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:46:03,080 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:46:03,080 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:46:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-03 00:46:03,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 00:46:03,117 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:46:03,120 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:46:03,121 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:46:03,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:46:03,125 INFO L82 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 1 times [2021-05-03 00:46:03,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:46:03,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106910799] [2021-05-03 00:46:03,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:46:03,215 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:46:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:46:03,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:46:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:46:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:46:03,459 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:46:03,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106910799] [2021-05-03 00:46:03,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [106910799] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:46:03,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:46:03,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:46:03,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156340384] [2021-05-03 00:46:03,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:46:03,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:46:03,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:46:03,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:46:03,482 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:46:03,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:46:03,617 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-05-03 00:46:03,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:46:03,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-03 00:46:03,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:46:03,626 INFO L225 Difference]: With dead ends: 41 [2021-05-03 00:46:03,626 INFO L226 Difference]: Without dead ends: 19 [2021-05-03 00:46:03,631 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:46:03,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-03 00:46:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-03 00:46:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:46:03,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-03 00:46:03,675 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-03 00:46:03,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:46:03,676 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-03 00:46:03,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:46:03,677 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-03 00:46:03,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 00:46:03,678 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:46:03,678 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:46:03,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:46:03,679 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:46:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:46:03,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 1 times [2021-05-03 00:46:03,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:46:03,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414771096] [2021-05-03 00:46:03,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:46:03,688 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:46:03,713 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:46:03,713 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:46:03,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:46:03,731 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:46:03,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:46:03 BoogieIcfgContainer [2021-05-03 00:46:03,732 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:46:03,734 INFO L168 Benchmark]: Toolchain (without parser) took 1313.88 ms. Allocated memory is still 190.8 MB. Free memory was 157.1 MB in the beginning and 127.4 MB in the end (delta: 29.7 MB). Peak memory consumption was 30.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:46:03,735 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 190.8 MB. Free memory is still 173.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:46:03,736 INFO L168 Benchmark]: CACSL2BoogieTranslator took 193.75 ms. Allocated memory is still 190.8 MB. Free memory was 156.9 MB in the beginning and 146.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-03 00:46:03,736 INFO L168 Benchmark]: Boogie Preprocessor took 81.86 ms. Allocated memory is still 190.8 MB. Free memory was 146.8 MB in the beginning and 175.0 MB in the end (delta: -28.1 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2021-05-03 00:46:03,738 INFO L168 Benchmark]: RCFGBuilder took 312.12 ms. Allocated memory is still 190.8 MB. Free memory was 175.0 MB in the beginning and 160.7 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-03 00:46:03,739 INFO L168 Benchmark]: TraceAbstraction took 719.67 ms. Allocated memory is still 190.8 MB. Free memory was 160.3 MB in the beginning and 127.4 MB in the end (delta: 32.9 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. [2021-05-03 00:46:03,744 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 190.8 MB. Free memory is still 173.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 193.75 ms. Allocated memory is still 190.8 MB. Free memory was 156.9 MB in the beginning and 146.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 81.86 ms. Allocated memory is still 190.8 MB. Free memory was 146.8 MB in the beginning and 175.0 MB in the end (delta: -28.1 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 312.12 ms. Allocated memory is still 190.8 MB. Free memory was 175.0 MB in the beginning and 160.7 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 719.67 ms. Allocated memory is still 190.8 MB. Free memory was 160.3 MB in the beginning and 127.4 MB in the end (delta: 32.9 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 [L27] EXPR counter++ [L27] COND FALSE !(counter++<10) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) [L10] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 644.0ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 12.3ms, AutomataDifference: 161.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 25.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 24 SDtfs, 6 SDslu, 4 SDs, 0 SdLazy, 13 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 60.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 31.3ms AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...