/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-zilu/benchmark10_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:07:41,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:07:41,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:07:41,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 19:07:41,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:07:41,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:07:41,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:07:41,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:07:41,996 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:07:41,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:07:41,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:07:41,999 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:07:41,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:07:41,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:07:41,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:07:41,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:07:41,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:07:41,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:07:42,000 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:07:42,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:07:42,001 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:07:42,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:07:42,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:07:42,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:07:42,001 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:07:42,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:07:42,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:07:42,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:07:42,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:07:42,003 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:07:42,003 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:07:42,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:07:42,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:07:42,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:07:42,318 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:07:42,318 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:07:42,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark10_conjunctive.i [2021-05-02 19:07:42,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3c28f07d/d96959e1174842bfb70bbe9dd41f0874/FLAGc82695fc6 [2021-05-02 19:07:42,715 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:07:42,716 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark10_conjunctive.i [2021-05-02 19:07:42,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3c28f07d/d96959e1174842bfb70bbe9dd41f0874/FLAGc82695fc6 [2021-05-02 19:07:43,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3c28f07d/d96959e1174842bfb70bbe9dd41f0874 [2021-05-02 19:07:43,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:07:43,172 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:07:43,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:07:43,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:07:43,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:07:43,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:07:43" (1/1) ... [2021-05-02 19:07:43,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6985faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:43, skipping insertion in model container [2021-05-02 19:07:43,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:07:43" (1/1) ... [2021-05-02 19:07:43,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:07:43,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:07:43,310 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-zilu/benchmark10_conjunctive.i[873,886] [2021-05-02 19:07:43,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:07:43,321 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:07:43,329 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-zilu/benchmark10_conjunctive.i[873,886] [2021-05-02 19:07:43,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:07:43,369 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:07:43,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:43 WrapperNode [2021-05-02 19:07:43,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:07:43,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:07:43,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:07:43,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:07:43,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:43" (1/1) ... [2021-05-02 19:07:43,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:43" (1/1) ... [2021-05-02 19:07:43,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:43" (1/1) ... [2021-05-02 19:07:43,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:43" (1/1) ... [2021-05-02 19:07:43,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:43" (1/1) ... [2021-05-02 19:07:43,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:43" (1/1) ... [2021-05-02 19:07:43,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:43" (1/1) ... [2021-05-02 19:07:43,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:07:43,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:07:43,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:07:43,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:07:43,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:43" (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 19:07:43,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:07:43,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:07:43,551 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:07:43,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:07:43,552 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:07:43,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:07:43,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 19:07:43,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 19:07:43,552 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:07:43,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:07:43,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:07:43,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-02 19:07:43,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:07:43,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:07:43,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:07:43,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:07:43,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:07:43,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:07:43,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:07:43,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:07:43,778 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:07:43,778 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:07:43,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:07:43 BoogieIcfgContainer [2021-05-02 19:07:43,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:07:43,780 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:07:43,780 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:07:43,780 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:07:43,785 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:07:43" (1/1) ... [2021-05-02 19:07:43,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:07:43 BasicIcfg [2021-05-02 19:07:43,796 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:07:43,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:07:43,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:07:43,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:07:43,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:07:43" (1/4) ... [2021-05-02 19:07:43,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e23b301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:07:43, skipping insertion in model container [2021-05-02 19:07:43,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:07:43" (2/4) ... [2021-05-02 19:07:43,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e23b301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:07:43, skipping insertion in model container [2021-05-02 19:07:43,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:07:43" (3/4) ... [2021-05-02 19:07:43,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e23b301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:07:43, skipping insertion in model container [2021-05-02 19:07:43,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:07:43" (4/4) ... [2021-05-02 19:07:43,818 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark10_conjunctive.iJordan [2021-05-02 19:07:43,821 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:07:43,824 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:07:43,849 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:07:43,869 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:07:43,870 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:07:43,870 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:07:43,870 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:07:43,870 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:07:43,870 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:07:43,870 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:07:43,870 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:07:43,882 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 19:07:43,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:07:43,887 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:07:43,888 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:07:43,888 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:07:43,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:07:43,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1724549087, now seen corresponding path program 1 times [2021-05-02 19:07:43,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:07:43,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814825432] [2021-05-02 19:07:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:07:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:44,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:07:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:44,073 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 19:07:44,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:07:44,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814825432] [2021-05-02 19:07:44,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814825432] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:07:44,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:07:44,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:07:44,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320981730] [2021-05-02 19:07:44,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:07:44,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:07:44,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:07:44,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:07:44,090 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 19:07:44,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:07:44,123 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-05-02 19:07:44,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:07:44,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2021-05-02 19:07:44,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:07:44,132 INFO L225 Difference]: With dead ends: 21 [2021-05-02 19:07:44,132 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 19:07:44,133 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:07:44,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 19:07:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 19:07:44,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 19:07:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-05-02 19:07:44,152 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-05-02 19:07:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:07:44,153 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-05-02 19:07:44,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 19:07:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-05-02 19:07:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:07:44,154 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:07:44,154 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:07:44,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:07:44,155 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:07:44,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:07:44,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1725472608, now seen corresponding path program 1 times [2021-05-02 19:07:44,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:07:44,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38843019] [2021-05-02 19:07:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:07:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:44,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:07:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:44,255 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 19:07:44,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:07:44,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38843019] [2021-05-02 19:07:44,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38843019] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:07:44,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:07:44,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:07:44,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611411038] [2021-05-02 19:07:44,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 19:07:44,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:07:44,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 19:07:44,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:07:44,257 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 19:07:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:07:44,319 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-05-02 19:07:44,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 19:07:44,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2021-05-02 19:07:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:07:44,334 INFO L225 Difference]: With dead ends: 16 [2021-05-02 19:07:44,334 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 19:07:44,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:07:44,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 19:07:44,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-02 19:07:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 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 19:07:44,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-02 19:07:44,337 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-05-02 19:07:44,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:07:44,338 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-02 19:07:44,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 19:07:44,338 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-02 19:07:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 19:07:44,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:07:44,338 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:07:44,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 19:07:44,339 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:07:44,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:07:44,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1979475853, now seen corresponding path program 1 times [2021-05-02 19:07:44,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:07:44,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329021628] [2021-05-02 19:07:44,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:07:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:44,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:07:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:44,405 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 19:07:44,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:07:44,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329021628] [2021-05-02 19:07:44,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329021628] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:07:44,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:07:44,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 19:07:44,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009955356] [2021-05-02 19:07:44,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:07:44,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:07:44,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:07:44,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:07:44,407 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 19:07:44,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:07:44,482 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-05-02 19:07:44,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 19:07:44,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 13 [2021-05-02 19:07:44,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:07:44,483 INFO L225 Difference]: With dead ends: 15 [2021-05-02 19:07:44,483 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 19:07:44,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:07:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 19:07:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 19:07:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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 19:07:44,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 19:07:44,485 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-05-02 19:07:44,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:07:44,486 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 19:07:44,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 19:07:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 19:07:44,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 19:07:44,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:07:44,486 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:07:44,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 19:07:44,486 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:07:44,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:07:44,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1260871293, now seen corresponding path program 1 times [2021-05-02 19:07:44,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:07:44,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151018567] [2021-05-02 19:07:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:07:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:44,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:07:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:44,552 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 19:07:44,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:07:44,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151018567] [2021-05-02 19:07:44,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151018567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:07:44,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000759967] [2021-05-02 19:07:44,553 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 19:07:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:44,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 19:07:44,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:07:44,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:07:44,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:07:44,730 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 19:07:44,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000759967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:07:44,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:07:44,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-02 19:07:44,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095449717] [2021-05-02 19:07:44,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:07:44,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:07:44,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:07:44,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:07:44,741 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 19:07:44,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:07:44,833 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-05-02 19:07:44,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 19:07:44,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 14 [2021-05-02 19:07:44,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:07:44,834 INFO L225 Difference]: With dead ends: 17 [2021-05-02 19:07:44,834 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 19:07:44,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:07:44,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 19:07:44,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 19:07:44,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 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 19:07:44,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 19:07:44,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-02 19:07:44,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:07:44,837 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 19:07:44,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 19:07:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 19:07:44,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 19:07:44,838 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:07:44,838 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:07:45,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:07:45,054 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:07:45,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:07:45,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1455606362, now seen corresponding path program 2 times [2021-05-02 19:07:45,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:07:45,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568275787] [2021-05-02 19:07:45,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:07:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:45,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:07:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:07:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:07:45,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:07:45,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568275787] [2021-05-02 19:07:45,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568275787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:07:45,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112562108] [2021-05-02 19:07:45,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:07:45,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:07:45,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:07:45,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 19:07:45,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:07:45,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:07:45,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:07:45,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:07:45,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:07:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:07:45,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112562108] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:07:45,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:07:45,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2021-05-02 19:07:45,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616947437] [2021-05-02 19:07:45,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:07:45,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:07:45,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:07:45,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:07:45,278 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:07:45,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:07:45,457 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-05-02 19:07:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:07:45,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-02 19:07:45,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:07:45,458 INFO L225 Difference]: With dead ends: 17 [2021-05-02 19:07:45,458 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:07:45,459 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:07:45,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:07:45,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:07:45,464 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 19:07:45,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:07:45,464 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2021-05-02 19:07:45,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:07:45,464 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:07:45,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:07:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:07:45,464 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:07:45,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:07:45,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:07:45 BasicIcfg [2021-05-02 19:07:45,673 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:07:45,673 INFO L168 Benchmark]: Toolchain (without parser) took 2501.56 ms. Allocated memory is still 186.6 MB. Free memory was 151.3 MB in the beginning and 89.7 MB in the end (delta: 61.6 MB). Peak memory consumption was 62.5 MB. Max. memory is 8.0 GB. [2021-05-02 19:07:45,673 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 186.6 MB. Free memory is still 168.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:07:45,673 INFO L168 Benchmark]: CACSL2BoogieTranslator took 193.92 ms. Allocated memory is still 186.6 MB. Free memory was 151.2 MB in the beginning and 170.8 MB in the end (delta: -19.6 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. [2021-05-02 19:07:45,674 INFO L168 Benchmark]: Boogie Preprocessor took 66.36 ms. Allocated memory is still 186.6 MB. Free memory was 170.8 MB in the beginning and 170.6 MB in the end (delta: 168.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:07:45,674 INFO L168 Benchmark]: RCFGBuilder took 340.88 ms. Allocated memory is still 186.6 MB. Free memory was 170.1 MB in the beginning and 156.5 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 19:07:45,674 INFO L168 Benchmark]: IcfgTransformer took 16.28 ms. Allocated memory is still 186.6 MB. Free memory was 156.5 MB in the beginning and 155.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:07:45,674 INFO L168 Benchmark]: TraceAbstraction took 1875.58 ms. Allocated memory is still 186.6 MB. Free memory was 154.9 MB in the beginning and 89.7 MB in the end (delta: 65.2 MB). Peak memory consumption was 66.2 MB. Max. memory is 8.0 GB. [2021-05-02 19:07:45,675 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 186.6 MB. Free memory is still 168.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 193.92 ms. Allocated memory is still 186.6 MB. Free memory was 151.2 MB in the beginning and 170.8 MB in the end (delta: -19.6 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.36 ms. Allocated memory is still 186.6 MB. Free memory was 170.8 MB in the beginning and 170.6 MB in the end (delta: 168.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 340.88 ms. Allocated memory is still 186.6 MB. Free memory was 170.1 MB in the beginning and 156.5 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.28 ms. Allocated memory is still 186.6 MB. Free memory was 156.5 MB in the beginning and 155.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1875.58 ms. Allocated memory is still 186.6 MB. Free memory was 154.9 MB in the beginning and 89.7 MB in the end (delta: 65.2 MB). Peak memory consumption was 66.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1802.1ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 9.9ms, AutomataDifference: 493.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 62 SDtfs, 54 SDslu, 70 SDs, 0 SdLazy, 112 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 128.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 415.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 21.7ms AutomataMinimizationTime, 5 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 26.8ms SsaConstructionTime, 87.4ms SatisfiabilityAnalysisTime, 510.6ms InterpolantComputationTime, 97 NumberOfCodeBlocks, 97 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 262 SizeOfPredicates, 0 NumberOfNonLiveVariables, 180 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 1/10 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...