/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 02:47:21,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 02:47:21,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 02:47:21,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 02:47:21,678 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-01 02:47:21,692 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 02:47:21,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 02:47:21,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 02:47:21,695 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 02:47:21,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 02:47:21,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 02:47:21,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 02:47:21,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 02:47:21,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 02:47:21,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 02:47:21,696 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 02:47:21,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 02:47:21,696 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 02:47:21,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 02:47:21,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 02:47:21,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 02:47:21,697 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 02:47:21,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 02:47:21,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 02:47:21,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 02:47:21,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-01 02:47:21,698 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-01 02:47:21,698 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 02:47:21,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 02:47:22,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 02:47:22,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 02:47:22,013 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 02:47:22,013 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 02:47:22,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-05-01 02:47:22,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12a70ff11/8eb6773f198d4d0eba697c1a7e2d0cd6/FLAG61ad87ce7 [2021-05-01 02:47:22,466 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 02:47:22,466 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-05-01 02:47:22,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12a70ff11/8eb6773f198d4d0eba697c1a7e2d0cd6/FLAG61ad87ce7 [2021-05-01 02:47:22,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12a70ff11/8eb6773f198d4d0eba697c1a7e2d0cd6 [2021-05-01 02:47:22,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 02:47:22,492 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-01 02:47:22,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 02:47:22,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 02:47:22,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 02:47:22,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 02:47:22" (1/1) ... [2021-05-01 02:47:22,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64f23c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:22, skipping insertion in model container [2021-05-01 02:47:22,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 02:47:22" (1/1) ... [2021-05-01 02:47:22,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 02:47:22,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 02:47:22,627 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/for_bounded_loop1.c[416,429] [2021-05-01 02:47:22,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 02:47:22,643 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 02:47:22,653 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/for_bounded_loop1.c[416,429] [2021-05-01 02:47:22,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 02:47:22,668 INFO L208 MainTranslator]: Completed translation [2021-05-01 02:47:22,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:22 WrapperNode [2021-05-01 02:47:22,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 02:47:22,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 02:47:22,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 02:47:22,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 02:47:22,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:22" (1/1) ... [2021-05-01 02:47:22,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:22" (1/1) ... [2021-05-01 02:47:22,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:22" (1/1) ... [2021-05-01 02:47:22,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:22" (1/1) ... [2021-05-01 02:47:22,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:22" (1/1) ... [2021-05-01 02:47:22,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:22" (1/1) ... [2021-05-01 02:47:22,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:22" (1/1) ... [2021-05-01 02:47:22,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 02:47:22,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 02:47:22,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 02:47:22,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 02:47:22,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:22" (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 [2021-05-01 02:47:22,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 02:47:22,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 02:47:22,805 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 02:47:22,805 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 02:47:22,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 02:47:22,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 02:47:22,805 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 02:47:22,805 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 02:47:22,806 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 02:47:22,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 02:47:22,806 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 02:47:22,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 02:47:22,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 02:47:22,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 02:47:22,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 02:47:22,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 02:47:22,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 02:47:22,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 02:47:22,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 02:47:22,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 02:47:22,994 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 02:47:22,994 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 02:47:22,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 02:47:22 BoogieIcfgContainer [2021-05-01 02:47:22,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 02:47:22,996 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-01 02:47:22,996 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-01 02:47:22,997 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-01 02:47:22,999 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 02:47:22" (1/1) ... [2021-05-01 02:47:23,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 01.05 02:47:23 BasicIcfg [2021-05-01 02:47:23,013 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-01 02:47:23,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 02:47:23,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 02:47:23,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 02:47:23,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 02:47:22" (1/4) ... [2021-05-01 02:47:23,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60af87ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 02:47:23, skipping insertion in model container [2021-05-01 02:47:23,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:22" (2/4) ... [2021-05-01 02:47:23,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60af87ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 02:47:23, skipping insertion in model container [2021-05-01 02:47:23,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 02:47:22" (3/4) ... [2021-05-01 02:47:23,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60af87ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 02:47:23, skipping insertion in model container [2021-05-01 02:47:23,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 01.05 02:47:23" (4/4) ... [2021-05-01 02:47:23,019 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.cJordan [2021-05-01 02:47:23,022 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-01 02:47:23,037 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 02:47:23,048 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 02:47:23,059 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 02:47:23,059 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-01 02:47:23,059 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-01 02:47:23,059 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 02:47:23,059 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 02:47:23,059 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 02:47:23,060 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 02:47:23,060 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 02:47:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 02:47:23,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 02:47:23,071 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 02:47:23,072 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 02:47:23,072 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 02:47:23,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 02:47:23,082 INFO L82 PathProgramCache]: Analyzing trace with hash -932305726, now seen corresponding path program 1 times [2021-05-01 02:47:23,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 02:47:23,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613000987] [2021-05-01 02:47:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 02:47:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 02:47:23,196 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,197 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:23,198 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,198 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:23,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 02:47:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 02:47:23,241 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,242 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 02:47:23,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 02:47:23,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613000987] [2021-05-01 02:47:23,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613000987] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 02:47:23,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 02:47:23,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 02:47:23,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395204288] [2021-05-01 02:47:23,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 02:47:23,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 02:47:23,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 02:47:23,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 02:47:23,261 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.6666666666666665) 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) [2021-05-01 02:47:23,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 02:47:23,306 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-05-01 02:47:23,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 02:47:23,307 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 [2021-05-01 02:47:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 02:47:23,311 INFO L225 Difference]: With dead ends: 24 [2021-05-01 02:47:23,311 INFO L226 Difference]: Without dead ends: 20 [2021-05-01 02:47:23,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 02:47:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-01 02:47:23,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-01 02:47:23,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 02:47:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-05-01 02:47:23,332 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2021-05-01 02:47:23,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 02:47:23,332 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-05-01 02:47:23,332 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) [2021-05-01 02:47:23,332 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-05-01 02:47:23,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 02:47:23,333 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 02:47:23,333 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 02:47:23,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 02:47:23,333 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 02:47:23,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 02:47:23,334 INFO L82 PathProgramCache]: Analyzing trace with hash -931382205, now seen corresponding path program 1 times [2021-05-01 02:47:23,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 02:47:23,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622299378] [2021-05-01 02:47:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 02:47:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 02:47:23,372 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,373 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:23,376 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,377 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 02:47:23,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,382 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:23,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 02:47:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 02:47:23,417 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,417 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 02:47:23,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 02:47:23,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622299378] [2021-05-01 02:47:23,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622299378] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 02:47:23,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 02:47:23,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-01 02:47:23,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587692528] [2021-05-01 02:47:23,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-01 02:47:23,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 02:47:23,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-01 02:47:23,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-01 02:47:23,420 INFO L87 Difference]: Start difference. First operand 20 states and 22 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) [2021-05-01 02:47:23,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 02:47:23,539 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-05-01 02:47:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-01 02:47:23,539 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 [2021-05-01 02:47:23,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 02:47:23,540 INFO L225 Difference]: With dead ends: 26 [2021-05-01 02:47:23,540 INFO L226 Difference]: Without dead ends: 26 [2021-05-01 02:47:23,541 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-01 02:47:23,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-01 02:47:23,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-05-01 02:47:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 02:47:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-05-01 02:47:23,553 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2021-05-01 02:47:23,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 02:47:23,554 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-05-01 02:47:23,558 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) [2021-05-01 02:47:23,558 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-05-01 02:47:23,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 02:47:23,559 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 02:47:23,559 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 02:47:23,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 02:47:23,559 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 02:47:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 02:47:23,560 INFO L82 PathProgramCache]: Analyzing trace with hash -930428893, now seen corresponding path program 1 times [2021-05-01 02:47:23,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 02:47:23,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61824392] [2021-05-01 02:47:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 02:47:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 02:47:23,613 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,614 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:23,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 02:47:23,625 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-05-01 02:47:23,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-05-01 02:47:23,633 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,634 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 02:47:23,639 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,639 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 02:47:23,648 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:23,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 02:47:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 02:47:23,693 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,693 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 02:47:23,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 02:47:23,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61824392] [2021-05-01 02:47:23,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61824392] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 02:47:23,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 02:47:23,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 02:47:23,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61726144] [2021-05-01 02:47:23,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 02:47:23,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 02:47:23,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 02:47:23,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-01 02:47:23,696 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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) [2021-05-01 02:47:23,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 02:47:23,899 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-05-01 02:47:23,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-01 02:47:23,899 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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 [2021-05-01 02:47:23,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 02:47:23,901 INFO L225 Difference]: With dead ends: 28 [2021-05-01 02:47:23,901 INFO L226 Difference]: Without dead ends: 28 [2021-05-01 02:47:23,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-01 02:47:23,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-01 02:47:23,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-05-01 02:47:23,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-01 02:47:23,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-05-01 02:47:23,908 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2021-05-01 02:47:23,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 02:47:23,908 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-05-01 02:47:23,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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) [2021-05-01 02:47:23,909 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-05-01 02:47:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-01 02:47:23,909 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 02:47:23,909 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 02:47:23,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 02:47:23,910 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 02:47:23,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 02:47:23,912 INFO L82 PathProgramCache]: Analyzing trace with hash 231391925, now seen corresponding path program 1 times [2021-05-01 02:47:23,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 02:47:23,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652346157] [2021-05-01 02:47:23,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 02:47:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 02:47:23,948 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,948 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:23,949 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 02:47:23,964 INFO L142 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-05-01 02:47:23,965 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-01 02:47:23,971 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,972 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-05-01 02:47:23,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 02:47:23,983 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,984 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 02:47:23,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:24,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 02:47:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 02:47:24,033 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:24,033 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:24,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-01 02:47:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 02:47:24,036 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:24,036 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 02:47:24,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 02:47:24,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652346157] [2021-05-01 02:47:24,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652346157] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 02:47:24,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 02:47:24,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 02:47:24,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119790755] [2021-05-01 02:47:24,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 02:47:24,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 02:47:24,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 02:47:24,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-01 02:47:24,039 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 02:47:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 02:47:24,260 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-01 02:47:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-01 02:47:24,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-05-01 02:47:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 02:47:24,262 INFO L225 Difference]: With dead ends: 36 [2021-05-01 02:47:24,262 INFO L226 Difference]: Without dead ends: 36 [2021-05-01 02:47:24,263 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-01 02:47:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-01 02:47:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-05-01 02:47:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 02:47:24,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-01 02:47:24,270 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2021-05-01 02:47:24,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 02:47:24,271 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-01 02:47:24,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 02:47:24,271 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-01 02:47:24,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-01 02:47:24,272 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 02:47:24,273 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 02:47:24,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 02:47:24,276 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 02:47:24,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 02:47:24,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1683544803, now seen corresponding path program 1 times [2021-05-01 02:47:24,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 02:47:24,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390874336] [2021-05-01 02:47:24,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 02:47:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 02:47:24,307 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 02:47:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 02:47:24,325 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 02:47:24,340 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-01 02:47:24,340 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 02:47:24,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-01 02:47:24,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 02:47:24 BasicIcfg [2021-05-01 02:47:24,368 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 02:47:24,369 INFO L168 Benchmark]: Toolchain (without parser) took 1877.32 ms. Allocated memory was 173.0 MB in the beginning and 221.2 MB in the end (delta: 48.2 MB). Free memory was 139.3 MB in the beginning and 146.2 MB in the end (delta: -6.9 MB). Peak memory consumption was 42.6 MB. Max. memory is 8.0 GB. [2021-05-01 02:47:24,369 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 173.0 MB. Free memory was 155.9 MB in the beginning and 155.8 MB in the end (delta: 106.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 02:47:24,370 INFO L168 Benchmark]: CACSL2BoogieTranslator took 173.50 ms. Allocated memory is still 173.0 MB. Free memory was 139.1 MB in the beginning and 129.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-01 02:47:24,370 INFO L168 Benchmark]: Boogie Preprocessor took 59.01 ms. Allocated memory is still 173.0 MB. Free memory was 129.6 MB in the beginning and 157.3 MB in the end (delta: -27.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-01 02:47:24,370 INFO L168 Benchmark]: RCFGBuilder took 264.06 ms. Allocated memory is still 173.0 MB. Free memory was 157.3 MB in the beginning and 142.8 MB in the end (delta: 14.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-01 02:47:24,371 INFO L168 Benchmark]: IcfgTransformer took 17.52 ms. Allocated memory is still 173.0 MB. Free memory was 142.8 MB in the beginning and 141.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 02:47:24,371 INFO L168 Benchmark]: TraceAbstraction took 1353.86 ms. Allocated memory was 173.0 MB in the beginning and 221.2 MB in the end (delta: 48.2 MB). Free memory was 141.2 MB in the beginning and 146.2 MB in the end (delta: -5.1 MB). Peak memory consumption was 44.6 MB. Max. memory is 8.0 GB. [2021-05-01 02:47:24,373 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 173.0 MB. Free memory was 155.9 MB in the beginning and 155.8 MB in the end (delta: 106.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 173.50 ms. Allocated memory is still 173.0 MB. Free memory was 139.1 MB in the beginning and 129.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.01 ms. Allocated memory is still 173.0 MB. Free memory was 129.6 MB in the beginning and 157.3 MB in the end (delta: -27.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 264.06 ms. Allocated memory is still 173.0 MB. Free memory was 157.3 MB in the beginning and 142.8 MB in the end (delta: 14.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 17.52 ms. Allocated memory is still 173.0 MB. Free memory was 142.8 MB in the beginning and 141.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1353.86 ms. Allocated memory was 173.0 MB in the beginning and 221.2 MB in the end (delta: 48.2 MB). Free memory was 141.2 MB in the beginning and 146.2 MB in the end (delta: -5.1 MB). Peak memory consumption was 44.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i=0, x=0, y=0; [L20] int n=__VERIFIER_nondet_int(); [L21] COND FALSE !(!(n>0)) [L22] i=0 VAL [i=0, n=1, x=0, y=0] [L22] COND TRUE i