/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/loops/sum01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:38:45,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:38:45,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:38:45,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:38:45,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:38:45,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:38:45,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:38:45,498 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:38:45,511 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:38:45,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:38:45,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:38:45,514 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:38:45,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:38:45,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:38:45,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:38:45,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:38:45,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:38:45,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:38:45,516 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:38:45,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:38:45,516 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:38:45,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:38:45,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:38:45,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:38:45,516 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:38:45,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:38:45,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:38:45,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:38:45,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:38:45,518 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:38:45,518 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:38:45,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:38:45,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:38:45,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:38:45,777 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:38:45,777 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:38:45,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-2.i [2021-05-02 17:38:45,818 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bed474f4/aba751f70a0446adbb6c2e7664da6758/FLAG00db9e2d0 [2021-05-02 17:38:46,162 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:38:46,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-2.i [2021-05-02 17:38:46,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bed474f4/aba751f70a0446adbb6c2e7664da6758/FLAG00db9e2d0 [2021-05-02 17:38:46,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bed474f4/aba751f70a0446adbb6c2e7664da6758 [2021-05-02 17:38:46,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:38:46,607 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:38:46,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:38:46,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:38:46,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:38:46,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:38:46" (1/1) ... [2021-05-02 17:38:46,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c92fa51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:46, skipping insertion in model container [2021-05-02 17:38:46,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:38:46" (1/1) ... [2021-05-02 17:38:46,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:38:46,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:38:46,714 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-2.i[849,862] [2021-05-02 17:38:46,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:38:46,724 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:38:46,760 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-2.i[849,862] [2021-05-02 17:38:46,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:38:46,777 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:38:46,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:46 WrapperNode [2021-05-02 17:38:46,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:38:46,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:38:46,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:38:46,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:38:46,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:46" (1/1) ... [2021-05-02 17:38:46,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:46" (1/1) ... [2021-05-02 17:38:46,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:46" (1/1) ... [2021-05-02 17:38:46,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:46" (1/1) ... [2021-05-02 17:38:46,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:46" (1/1) ... [2021-05-02 17:38:46,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:46" (1/1) ... [2021-05-02 17:38:46,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:46" (1/1) ... [2021-05-02 17:38:46,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:38:46,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:38:46,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:38:46,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:38:46,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:46" (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 17:38:46,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:38:46,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:38:46,870 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:38:46,870 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:38:46,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:38:46,870 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:38:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:38:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 17:38:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 17:38:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:38:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:38:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:38:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 17:38:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:38:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:38:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:38:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:38:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:38:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:38:46,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:38:47,015 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:38:47,015 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:38:47,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:38:47 BoogieIcfgContainer [2021-05-02 17:38:47,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:38:47,017 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:38:47,017 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:38:47,017 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:38:47,019 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:38:47" (1/1) ... [2021-05-02 17:38:47,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:38:47 BasicIcfg [2021-05-02 17:38:47,029 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:38:47,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:38:47,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:38:47,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:38:47,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:38:46" (1/4) ... [2021-05-02 17:38:47,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d9716f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:38:47, skipping insertion in model container [2021-05-02 17:38:47,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:46" (2/4) ... [2021-05-02 17:38:47,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d9716f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:38:47, skipping insertion in model container [2021-05-02 17:38:47,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:38:47" (3/4) ... [2021-05-02 17:38:47,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d9716f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:38:47, skipping insertion in model container [2021-05-02 17:38:47,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:38:47" (4/4) ... [2021-05-02 17:38:47,034 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-2.iJordan [2021-05-02 17:38:47,037 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:38:47,039 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:38:47,062 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:38:47,075 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:38:47,075 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:38:47,075 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:38:47,075 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:38:47,075 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:38:47,075 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:38:47,075 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:38:47,075 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:38:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 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 17:38:47,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 17:38:47,088 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:47,089 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:47,089 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:47,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:47,092 INFO L82 PathProgramCache]: Analyzing trace with hash 797277979, now seen corresponding path program 1 times [2021-05-02 17:38:47,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:47,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216420222] [2021-05-02 17:38:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:47,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:47,244 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 17:38:47,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:47,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216420222] [2021-05-02 17:38:47,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216420222] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:38:47,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:38:47,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:38:47,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147811592] [2021-05-02 17:38:47,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:38:47,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:47,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:38:47,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:38:47,258 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 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 17:38:47,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:47,283 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-05-02 17:38:47,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:38:47,284 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 17:38:47,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:47,289 INFO L225 Difference]: With dead ends: 20 [2021-05-02 17:38:47,289 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 17:38:47,290 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:38:47,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 17:38:47,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 17:38:47,307 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 17:38:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 17:38:47,308 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 17:38:47,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:47,308 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 17:38:47,308 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 17:38:47,308 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 17:38:47,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 17:38:47,309 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:47,309 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:47,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:38:47,309 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:47,310 INFO L82 PathProgramCache]: Analyzing trace with hash 798201500, now seen corresponding path program 1 times [2021-05-02 17:38:47,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:47,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996631145] [2021-05-02 17:38:47,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:47,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:47,391 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 17:38:47,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:47,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996631145] [2021-05-02 17:38:47,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996631145] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:38:47,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:38:47,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 17:38:47,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007602410] [2021-05-02 17:38:47,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:38:47,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:47,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:38:47,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:38:47,394 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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 17:38:47,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:47,485 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-02 17:38:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:38:47,485 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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 17:38:47,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:47,486 INFO L225 Difference]: With dead ends: 18 [2021-05-02 17:38:47,486 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 17:38:47,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:38:47,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 17:38:47,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 17:38:47,488 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 17:38:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 17:38:47,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-02 17:38:47,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:47,489 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 17:38:47,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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 17:38:47,489 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 17:38:47,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 17:38:47,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:47,490 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:47,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:38:47,490 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:47,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:47,491 INFO L82 PathProgramCache]: Analyzing trace with hash -815155942, now seen corresponding path program 1 times [2021-05-02 17:38:47,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:47,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380853789] [2021-05-02 17:38:47,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:47,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:47,687 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 17:38:47,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:47,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380853789] [2021-05-02 17:38:47,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380853789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:47,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38970111] [2021-05-02 17:38:47,688 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 17:38:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:47,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:38:47,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:47,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,909 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 17:38:47,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38970111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:47,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:47,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-05-02 17:38:47,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139778064] [2021-05-02 17:38:47,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 17:38:47,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:47,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 17:38:47,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:38:47,915 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 15 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 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 17:38:48,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:48,108 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-02 17:38:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:38:48,108 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 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 14 [2021-05-02 17:38:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:48,109 INFO L225 Difference]: With dead ends: 20 [2021-05-02 17:38:48,109 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 17:38:48,109 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:38:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 17:38:48,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 17:38:48,110 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 17:38:48,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 17:38:48,111 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-02 17:38:48,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:48,111 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 17:38:48,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 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 17:38:48,111 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 17:38:48,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 17:38:48,112 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:48,112 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:48,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 17:38:48,325 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:48,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:48,326 INFO L82 PathProgramCache]: Analyzing trace with hash -768463848, now seen corresponding path program 2 times [2021-05-02 17:38:48,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:48,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248452676] [2021-05-02 17:38:48,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:48,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:48,483 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 17:38:48,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:48,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248452676] [2021-05-02 17:38:48,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248452676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:48,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618295012] [2021-05-02 17:38:48,484 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 17:38:48,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:38:48,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:38:48,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 17:38:48,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:48,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:48,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:48,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:48,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:48,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:48,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:48,673 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 17:38:48,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618295012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:48,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:48,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-05-02 17:38:48,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49903049] [2021-05-02 17:38:48,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 17:38:48,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:48,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 17:38:48,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 17:38:48,675 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 18 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 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 17:38:49,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:49,150 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-05-02 17:38:49,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 17:38:49,150 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 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 17:38:49,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:49,151 INFO L225 Difference]: With dead ends: 25 [2021-05-02 17:38:49,151 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 17:38:49,151 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 543.2ms TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-05-02 17:38:49,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 17:38:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-02 17:38:49,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 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 17:38:49,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-02 17:38:49,157 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2021-05-02 17:38:49,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:49,157 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-02 17:38:49,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 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 17:38:49,157 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-02 17:38:49,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 17:38:49,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:49,159 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:49,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:49,361 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:49,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:49,361 INFO L82 PathProgramCache]: Analyzing trace with hash 810656660, now seen corresponding path program 3 times [2021-05-02 17:38:49,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:49,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130680163] [2021-05-02 17:38:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:49,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:38:49,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:49,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130680163] [2021-05-02 17:38:49,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130680163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:49,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255223091] [2021-05-02 17:38:49,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:49,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 17:38:49,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:38:49,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 17:38:49,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:49,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:49,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:49,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:49,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:49,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:49,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:49,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255223091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:49,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:49,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-05-02 17:38:49,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098501735] [2021-05-02 17:38:49,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 17:38:49,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:49,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 17:38:49,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:38:49,759 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 23 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 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 17:38:50,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:50,350 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-05-02 17:38:50,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 17:38:50,351 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 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 20 [2021-05-02 17:38:50,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:50,351 INFO L225 Difference]: With dead ends: 22 [2021-05-02 17:38:50,351 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 17:38:50,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 715.1ms TimeCoverageRelationStatistics Valid=180, Invalid=1302, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 17:38:50,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 17:38:50,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 17:38:50,352 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 17:38:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 17:38:50,352 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-05-02 17:38:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:50,352 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 17:38:50,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 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 17:38:50,353 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 17:38:50,353 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 17:38:50,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:50,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:38:50 BasicIcfg [2021-05-02 17:38:50,557 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:38:50,557 INFO L168 Benchmark]: Toolchain (without parser) took 3949.88 ms. Allocated memory was 195.0 MB in the beginning and 282.1 MB in the end (delta: 87.0 MB). Free memory was 159.1 MB in the beginning and 259.3 MB in the end (delta: -100.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:38:50,557 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 195.0 MB. Free memory is still 175.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:38:50,558 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.00 ms. Allocated memory is still 195.0 MB. Free memory was 158.9 MB in the beginning and 177.0 MB in the end (delta: -18.1 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. [2021-05-02 17:38:50,558 INFO L168 Benchmark]: Boogie Preprocessor took 32.91 ms. Allocated memory is still 195.0 MB. Free memory was 177.0 MB in the beginning and 175.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:38:50,558 INFO L168 Benchmark]: RCFGBuilder took 202.90 ms. Allocated memory is still 195.0 MB. Free memory was 175.4 MB in the beginning and 161.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:38:50,558 INFO L168 Benchmark]: IcfgTransformer took 12.64 ms. Allocated memory is still 195.0 MB. Free memory was 161.7 MB in the beginning and 160.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:38:50,558 INFO L168 Benchmark]: TraceAbstraction took 3526.53 ms. Allocated memory was 195.0 MB in the beginning and 282.1 MB in the end (delta: 87.0 MB). Free memory was 160.2 MB in the beginning and 259.3 MB in the end (delta: -99.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:38:50,558 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 195.0 MB. Free memory is still 175.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 168.00 ms. Allocated memory is still 195.0 MB. Free memory was 158.9 MB in the beginning and 177.0 MB in the end (delta: -18.1 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.91 ms. Allocated memory is still 195.0 MB. Free memory was 177.0 MB in the beginning and 175.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 202.90 ms. Allocated memory is still 195.0 MB. Free memory was 175.4 MB in the beginning and 161.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 12.64 ms. Allocated memory is still 195.0 MB. Free memory was 161.7 MB in the beginning and 160.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3526.53 ms. Allocated memory was 195.0 MB in the beginning and 282.1 MB in the end (delta: 87.0 MB). Free memory was 160.2 MB in the beginning and 259.3 MB in the end (delta: -99.1 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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: 3480.5ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 9.6ms, AutomataDifference: 1402.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 53 SDtfs, 63 SDslu, 155 SDs, 0 SdLazy, 396 SolverSat, 58 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 222.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1650.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=4, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 19.3ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 38.6ms SsaConstructionTime, 95.0ms SatisfiabilityAnalysisTime, 1131.7ms InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 116 ConstructedInterpolants, 0 QuantifiedInterpolants, 764 SizeOfPredicates, 6 NumberOfNonLiveVariables, 272 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 4/42 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...