/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:21:05,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:21:05,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:21:05,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 18:21:05,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:21:05,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:21:05,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:21:05,665 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:21:05,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:21:05,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:21:05,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:21:05,681 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:21:05,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:21:05,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:21:05,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:21:05,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:21:05,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:21:05,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:21:05,682 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:21:05,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:21:05,682 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:21:05,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:21:05,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:21:05,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:21:05,683 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:21:05,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:21:05,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:21:05,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:21:05,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:21:05,684 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:21:05,684 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:21:05,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:21:05,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:21:05,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:21:05,996 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:21:05,996 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:21:05,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1.i [2021-05-02 18:21:06,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed718b649/7ed6d3d02920439a9f87c710f6928bfc/FLAGff2f8838a [2021-05-02 18:21:06,366 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:21:06,366 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1.i [2021-05-02 18:21:06,371 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed718b649/7ed6d3d02920439a9f87c710f6928bfc/FLAGff2f8838a [2021-05-02 18:21:06,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed718b649/7ed6d3d02920439a9f87c710f6928bfc [2021-05-02 18:21:06,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:21:06,789 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:21:06,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:21:06,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:21:06,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:21:06,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:21:06" (1/1) ... [2021-05-02 18:21:06,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52dd0621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:21:06, skipping insertion in model container [2021-05-02 18:21:06,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:21:06" (1/1) ... [2021-05-02 18:21:06,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:21:06,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:21:06,889 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1.i[891,904] [2021-05-02 18:21:06,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:21:06,900 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:21:06,909 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1.i[891,904] [2021-05-02 18:21:06,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:21:06,924 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:21:06,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:21:06 WrapperNode [2021-05-02 18:21:06,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:21:06,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:21:06,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:21:06,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:21:06,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:21:06" (1/1) ... [2021-05-02 18:21:06,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:21:06" (1/1) ... [2021-05-02 18:21:06,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:21:06" (1/1) ... [2021-05-02 18:21:06,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:21:06" (1/1) ... [2021-05-02 18:21:06,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:21:06" (1/1) ... [2021-05-02 18:21:06,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:21:06" (1/1) ... [2021-05-02 18:21:06,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:21:06" (1/1) ... [2021-05-02 18:21:06,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:21:06,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:21:06,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:21:06,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:21:06,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:21:06" (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 [2021-05-02 18:21:07,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:21:07,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:21:07,043 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:21:07,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:21:07,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:21:07,043 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:21:07,043 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:21:07,043 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:21:07,043 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 18:21:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 18:21:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:21:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:21:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:21:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:21:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 18:21:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:21:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:21:07,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:21:07,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:21:07,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:21:07,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:21:07,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:21:07,290 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:21:07,290 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 18:21:07,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:21:07 BoogieIcfgContainer [2021-05-02 18:21:07,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:21:07,292 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:21:07,292 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:21:07,292 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:21:07,294 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:21:07" (1/1) ... [2021-05-02 18:21:07,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:21:07 BasicIcfg [2021-05-02 18:21:07,314 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:21:07,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:21:07,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:21:07,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:21:07,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:21:06" (1/4) ... [2021-05-02 18:21:07,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa9a28e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:21:07, skipping insertion in model container [2021-05-02 18:21:07,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:21:06" (2/4) ... [2021-05-02 18:21:07,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa9a28e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:21:07, skipping insertion in model container [2021-05-02 18:21:07,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:21:07" (3/4) ... [2021-05-02 18:21:07,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa9a28e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:21:07, skipping insertion in model container [2021-05-02 18:21:07,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:21:07" (4/4) ... [2021-05-02 18:21:07,320 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_1.iJordan [2021-05-02 18:21:07,324 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:21:07,327 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:21:07,338 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:21:07,358 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:21:07,359 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:21:07,359 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:21:07,359 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:21:07,359 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:21:07,359 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:21:07,359 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:21:07,359 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:21:07,372 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:21:07,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 18:21:07,378 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:21:07,379 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:21:07,379 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:21:07,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:21:07,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1859546765, now seen corresponding path program 1 times [2021-05-02 18:21:07,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:21:07,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53057232] [2021-05-02 18:21:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:21:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:07,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:21:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:21:07,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:21:07,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53057232] [2021-05-02 18:21:07,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53057232] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:21:07,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:21:07,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:21:07,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495718041] [2021-05-02 18:21:07,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:21:07,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:21:07,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:21:07,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:21:07,550 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2021-05-02 18:21:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:21:07,574 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-02 18:21:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:21:07,576 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 [2021-05-02 18:21:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:21:07,581 INFO L225 Difference]: With dead ends: 20 [2021-05-02 18:21:07,581 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 18:21:07,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:21:07,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 18:21:07,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 18:21:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 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) [2021-05-02 18:21:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-02 18:21:07,601 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-02 18:21:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:21:07,601 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-02 18:21:07,601 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) [2021-05-02 18:21:07,601 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-02 18:21:07,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 18:21:07,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:21:07,602 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:21:07,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:21:07,602 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:21:07,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:21:07,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1860470286, now seen corresponding path program 1 times [2021-05-02 18:21:07,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:21:07,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900825031] [2021-05-02 18:21:07,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:21:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:07,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:21:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:21:07,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:21:07,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900825031] [2021-05-02 18:21:07,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900825031] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:21:07,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:21:07,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 18:21:07,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303161315] [2021-05-02 18:21:07,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 18:21:07,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:21:07,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 18:21:07,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 18:21:07,694 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2021-05-02 18:21:07,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:21:07,734 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-05-02 18:21:07,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 18:21:07,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 [2021-05-02 18:21:07,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:21:07,734 INFO L225 Difference]: With dead ends: 15 [2021-05-02 18:21:07,735 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 18:21:07,735 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 18:21:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 18:21:07,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-05-02 18:21:07,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 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) [2021-05-02 18:21:07,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 18:21:07,737 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2021-05-02 18:21:07,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:21:07,737 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 18:21:07,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2021-05-02 18:21:07,738 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 18:21:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 18:21:07,738 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:21:07,738 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:21:07,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:21:07,738 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:21:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:21:07,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2116914316, now seen corresponding path program 1 times [2021-05-02 18:21:07,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:21:07,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045314666] [2021-05-02 18:21:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:21:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:07,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:21:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:21:07,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:21:07,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045314666] [2021-05-02 18:21:07,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045314666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:21:07,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712725580] [2021-05-02 18:21:07,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:21:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:07,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 18:21:07,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:21:07,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:21:07,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712725580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:21:07,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:21:07,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 18:21:07,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301459800] [2021-05-02 18:21:07,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:21:07,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:21:07,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:21:07,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:21:07,894 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:07,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:21:07,948 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-05-02 18:21:07,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 18:21:07,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 18:21:07,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:21:07,949 INFO L225 Difference]: With dead ends: 17 [2021-05-02 18:21:07,949 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 18:21:07,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:21:07,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 18:21:07,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-05-02 18:21:07,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 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) [2021-05-02 18:21:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-02 18:21:07,951 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2021-05-02 18:21:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:21:07,951 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-02 18:21:07,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-02 18:21:07,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 18:21:07,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:21:07,952 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:21:08,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 18:21:08,163 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:21:08,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:21:08,163 INFO L82 PathProgramCache]: Analyzing trace with hash -548476022, now seen corresponding path program 2 times [2021-05-02 18:21:08,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:21:08,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832784459] [2021-05-02 18:21:08,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:21:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:08,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:21:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 18:21:08,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:21:08,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832784459] [2021-05-02 18:21:08,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832784459] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:21:08,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:21:08,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 18:21:08,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928247197] [2021-05-02 18:21:08,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 18:21:08,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:21:08,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 18:21:08,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:21:08,276 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-05-02 18:21:08,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:21:08,401 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-05-02 18:21:08,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 18:21:08,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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 15 [2021-05-02 18:21:08,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:21:08,402 INFO L225 Difference]: With dead ends: 14 [2021-05-02 18:21:08,403 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 18:21:08,404 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-02 18:21:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 18:21:08,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 18:21:08,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 18:21:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 18:21:08,405 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2021-05-02 18:21:08,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:21:08,405 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 18:21:08,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-05-02 18:21:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 18:21:08,405 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 18:21:08,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 18:21:08,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:21:08 BasicIcfg [2021-05-02 18:21:08,409 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 18:21:08,410 INFO L168 Benchmark]: Toolchain (without parser) took 1620.37 ms. Allocated memory is still 175.1 MB. Free memory was 141.2 MB in the beginning and 133.5 MB in the end (delta: 7.8 MB). Peak memory consumption was 8.7 MB. Max. memory is 8.0 GB. [2021-05-02 18:21:08,411 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 175.1 MB. Free memory is still 157.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:21:08,411 INFO L168 Benchmark]: CACSL2BoogieTranslator took 133.53 ms. Allocated memory is still 175.1 MB. Free memory was 141.1 MB in the beginning and 131.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 18:21:08,414 INFO L168 Benchmark]: Boogie Preprocessor took 62.51 ms. Allocated memory is still 175.1 MB. Free memory was 131.6 MB in the beginning and 158.5 MB in the end (delta: -26.9 MB). Peak memory consumption was 4.1 MB. Max. memory is 8.0 GB. [2021-05-02 18:21:08,418 INFO L168 Benchmark]: RCFGBuilder took 301.29 ms. Allocated memory is still 175.1 MB. Free memory was 158.5 MB in the beginning and 144.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 18:21:08,418 INFO L168 Benchmark]: IcfgTransformer took 22.17 ms. Allocated memory is still 175.1 MB. Free memory was 144.4 MB in the beginning and 142.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:21:08,418 INFO L168 Benchmark]: TraceAbstraction took 1093.55 ms. Allocated memory is still 175.1 MB. Free memory was 142.3 MB in the beginning and 133.5 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 8.0 GB. [2021-05-02 18:21:08,423 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 175.1 MB. Free memory is still 157.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 133.53 ms. Allocated memory is still 175.1 MB. Free memory was 141.1 MB in the beginning and 131.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 62.51 ms. Allocated memory is still 175.1 MB. Free memory was 131.6 MB in the beginning and 158.5 MB in the end (delta: -26.9 MB). Peak memory consumption was 4.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 301.29 ms. Allocated memory is still 175.1 MB. Free memory was 158.5 MB in the beginning and 144.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 22.17 ms. Allocated memory is still 175.1 MB. Free memory was 144.4 MB in the beginning and 142.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1093.55 ms. Allocated memory is still 175.1 MB. Free memory was 142.3 MB in the beginning and 133.5 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1049.1ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 11.5ms, AutomataDifference: 266.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 44 SDtfs, 40 SDslu, 43 SDs, 0 SdLazy, 60 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 276.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 14.3ms AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 11.6ms SsaConstructionTime, 62.3ms SatisfiabilityAnalysisTime, 338.4ms InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 184 SizeOfPredicates, 0 NumberOfNonLiveVariables, 74 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 4/6 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...