/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/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:38:35,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:38:35,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:38:35,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:38:35,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:38:35,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:38:35,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:38:35,742 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:38:35,749 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:38:35,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:38:35,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:38:35,750 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:38:35,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:38:35,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:38:35,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:38:35,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:38:35,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:38:35,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:38:35,751 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:38:35,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:38:35,751 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:38:35,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:38:35,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:38:35,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:38:35,751 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:38:35,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:38:35,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:38:35,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:38:35,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:38:35,752 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:38:35,752 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:38:35,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:38:35,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:38:36,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:38:36,001 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:38:36,002 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:38:36,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2021-05-02 17:38:36,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ff71911/a6a01227d0c14045ad3e7d1cb3ad2766/FLAG005e49329 [2021-05-02 17:38:36,331 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:38:36,332 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2021-05-02 17:38:36,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ff71911/a6a01227d0c14045ad3e7d1cb3ad2766/FLAG005e49329 [2021-05-02 17:38:36,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ff71911/a6a01227d0c14045ad3e7d1cb3ad2766 [2021-05-02 17:38:36,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:38:36,776 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:38:36,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:38:36,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:38:36,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:38:36,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:38:36" (1/1) ... [2021-05-02 17:38:36,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d77526e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:36, skipping insertion in model container [2021-05-02 17:38:36,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:38:36" (1/1) ... [2021-05-02 17:38:36,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:38:36,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:38:36,878 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/sum01-1.i[808,821] [2021-05-02 17:38:36,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:38:36,890 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:38:36,898 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/sum01-1.i[808,821] [2021-05-02 17:38:36,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:38:36,908 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:38:36,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:36 WrapperNode [2021-05-02 17:38:36,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:38:36,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:38:36,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:38:36,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:38:36,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:36" (1/1) ... [2021-05-02 17:38:36,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:36" (1/1) ... [2021-05-02 17:38:36,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:36" (1/1) ... [2021-05-02 17:38:36,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:36" (1/1) ... [2021-05-02 17:38:36,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:36" (1/1) ... [2021-05-02 17:38:36,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:36" (1/1) ... [2021-05-02 17:38:36,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:36" (1/1) ... [2021-05-02 17:38:36,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:38:36,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:38:36,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:38:36,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:38:36,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:36" (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 17:38:37,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:38:37,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:38:37,029 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:38:37,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:38:37,029 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:38:37,029 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:38:37,030 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:38:37,030 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 17:38:37,030 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 17:38:37,030 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:38:37,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:38:37,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:38:37,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 17:38:37,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:38:37,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:38:37,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:38:37,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:38:37,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:38:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:38:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:38:37,259 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:38:37,259 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:38:37,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:38:37 BoogieIcfgContainer [2021-05-02 17:38:37,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:38:37,261 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:38:37,261 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:38:37,262 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:38:37,263 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:38:37" (1/1) ... [2021-05-02 17:38:37,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:38:37 BasicIcfg [2021-05-02 17:38:37,274 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:38:37,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:38:37,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:38:37,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:38:37,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:38:36" (1/4) ... [2021-05-02 17:38:37,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c85d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:38:37, skipping insertion in model container [2021-05-02 17:38:37,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:38:36" (2/4) ... [2021-05-02 17:38:37,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c85d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:38:37, skipping insertion in model container [2021-05-02 17:38:37,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:38:37" (3/4) ... [2021-05-02 17:38:37,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c85d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:38:37, skipping insertion in model container [2021-05-02 17:38:37,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:38:37" (4/4) ... [2021-05-02 17:38:37,278 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.iJordan [2021-05-02 17:38:37,281 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:38:37,284 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:38:37,293 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:38:37,320 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:38:37,321 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:38:37,321 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:38:37,321 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:38:37,321 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:38:37,321 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:38:37,321 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:38:37,321 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:38:37,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 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 17:38:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 17:38:37,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:37,334 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:37,334 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:37,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:37,337 INFO L82 PathProgramCache]: Analyzing trace with hash -423489079, now seen corresponding path program 1 times [2021-05-02 17:38:37,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:37,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393274888] [2021-05-02 17:38:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:37,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:37,497 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 17:38:37,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:37,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393274888] [2021-05-02 17:38:37,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393274888] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:38:37,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:38:37,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:38:37,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394195993] [2021-05-02 17:38:37,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:38:37,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:37,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:38:37,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:38:37,512 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:37,538 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-05-02 17:38:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:38:37,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 17:38:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:37,544 INFO L225 Difference]: With dead ends: 20 [2021-05-02 17:38:37,544 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 17:38:37,546 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:38:37,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 17:38:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 17:38:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-05-02 17:38:37,563 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-05-02 17:38:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:37,564 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-05-02 17:38:37,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-05-02 17:38:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 17:38:37,564 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:37,564 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:37,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:38:37,565 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:37,565 INFO L82 PathProgramCache]: Analyzing trace with hash -422565558, now seen corresponding path program 1 times [2021-05-02 17:38:37,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:37,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263507657] [2021-05-02 17:38:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:37,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:37,663 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 17:38:37,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:37,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263507657] [2021-05-02 17:38:37,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263507657] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:38:37,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:38:37,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 17:38:37,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946133185] [2021-05-02 17:38:37,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:38:37,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:37,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:38:37,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:38:37,666 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:37,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:37,795 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-05-02 17:38:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:38:37,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 17:38:37,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:37,796 INFO L225 Difference]: With dead ends: 20 [2021-05-02 17:38:37,796 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 17:38:37,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:38:37,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 17:38:37,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 17:38:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 17:38:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 17:38:37,799 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 17:38:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:37,800 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 17:38:37,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 17:38:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 17:38:37,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:37,800 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:37,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:38:37,801 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:37,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:37,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1744981802, now seen corresponding path program 1 times [2021-05-02 17:38:37,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:37,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810482376] [2021-05-02 17:38:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:37,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:37,985 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 17:38:37,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:37,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810482376] [2021-05-02 17:38:37,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810482376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:37,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114178695] [2021-05-02 17:38:37,986 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 17:38:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:38,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:38:38,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:38,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:38,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:38,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:38,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:38,205 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 17:38:38,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114178695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:38,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:38,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-05-02 17:38:38,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800792605] [2021-05-02 17:38:38,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 17:38:38,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:38,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 17:38:38,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:38:38,226 INFO L87 Difference]: Start difference. First operand 17 states and 19 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 17:38:38,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:38,447 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-05-02 17:38:38,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:38:38,447 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 17:38:38,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:38,448 INFO L225 Difference]: With dead ends: 22 [2021-05-02 17:38:38,448 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 17:38:38,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 271.6ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:38:38,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 17:38:38,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 17:38:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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 17:38:38,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-05-02 17:38:38,454 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2021-05-02 17:38:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:38,454 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-05-02 17:38:38,454 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 17:38:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-05-02 17:38:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:38:38,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:38,455 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:38,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 17:38:38,669 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:38,669 INFO L82 PathProgramCache]: Analyzing trace with hash -112300598, now seen corresponding path program 2 times [2021-05-02 17:38:38,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:38,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705798846] [2021-05-02 17:38:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:38,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:38,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:38,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705798846] [2021-05-02 17:38:38,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705798846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:38,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503572030] [2021-05-02 17:38:38,793 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 17:38:38,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:38:38,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:38:38,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 17:38:38,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:38,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:38,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:38,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:38,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:38,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:39,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:39,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503572030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:39,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:39,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-05-02 17:38:39,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974765919] [2021-05-02 17:38:39,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 17:38:39,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:39,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 17:38:39,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-02 17:38:39,037 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 19 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:39,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:39,610 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-02 17:38:39,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 17:38:39,611 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 17:38:39,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:39,611 INFO L225 Difference]: With dead ends: 30 [2021-05-02 17:38:39,612 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 17:38:39,612 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 625.1ms TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 17:38:39,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 17:38:39,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-05-02 17:38:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 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 17:38:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-05-02 17:38:39,614 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 17 [2021-05-02 17:38:39,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:39,615 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-05-02 17:38:39,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:39,615 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-05-02 17:38:39,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 17:38:39,615 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:39,615 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:39,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:39,830 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:39,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:39,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1344754250, now seen corresponding path program 3 times [2021-05-02 17:38:39,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:39,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614836840] [2021-05-02 17:38:39,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:39,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:39,984 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 17:38:39,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:39,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614836840] [2021-05-02 17:38:39,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614836840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:39,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207767653] [2021-05-02 17:38:39,985 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 17:38:40,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 17:38:40,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:38:40,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 17:38:40,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:40,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:40,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:40,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:40,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:40,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:40,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:40,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207767653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:40,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:40,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-05-02 17:38:40,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314603535] [2021-05-02 17:38:40,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 17:38:40,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:40,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 17:38:40,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-05-02 17:38:40,281 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 24 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 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 17:38:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:41,144 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-02 17:38:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 17:38:41,144 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 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 23 [2021-05-02 17:38:41,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:41,145 INFO L225 Difference]: With dead ends: 36 [2021-05-02 17:38:41,145 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 17:38:41,145 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 913.8ms TimeCoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 17:38:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 17:38:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-02 17:38:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 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 17:38:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-05-02 17:38:41,148 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2021-05-02 17:38:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:41,148 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-05-02 17:38:41,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 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 17:38:41,148 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-05-02 17:38:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 17:38:41,148 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:41,148 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:41,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:41,357 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:41,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:41,357 INFO L82 PathProgramCache]: Analyzing trace with hash -641134069, now seen corresponding path program 1 times [2021-05-02 17:38:41,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:41,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405630691] [2021-05-02 17:38:41,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:41,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:41,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:41,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405630691] [2021-05-02 17:38:41,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405630691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:41,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075507248] [2021-05-02 17:38:41,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:41,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 17:38:41,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:41,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:41,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:41,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:41,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:41,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:41,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:41,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:41,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:41,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:41,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:41,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075507248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:41,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:41,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 17:38:41,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16842964] [2021-05-02 17:38:41,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:38:41,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:41,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:38:41,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:38:41,536 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:41,651 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-05-02 17:38:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:38:41,652 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 17:38:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:41,652 INFO L225 Difference]: With dead ends: 35 [2021-05-02 17:38:41,652 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 17:38:41,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:38:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 17:38:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-02 17:38:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 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 17:38:41,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-05-02 17:38:41,655 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2021-05-02 17:38:41,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:41,655 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-05-02 17:38:41,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:41,656 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-05-02 17:38:41,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 17:38:41,656 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:41,656 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:41,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:41,870 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:41,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:41,871 INFO L82 PathProgramCache]: Analyzing trace with hash -865055081, now seen corresponding path program 2 times [2021-05-02 17:38:41,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:41,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956466821] [2021-05-02 17:38:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:41,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:41,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:41,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956466821] [2021-05-02 17:38:41,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956466821] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:41,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376483134] [2021-05-02 17:38:41,929 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:41,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:38:41,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:38:41,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 17:38:41,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:41,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:41,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:41,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:42,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376483134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:42,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:42,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 17:38:42,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918243958] [2021-05-02 17:38:42,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:38:42,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:42,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:38:42,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:38:42,043 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:42,177 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-05-02 17:38:42,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:38:42,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-02 17:38:42,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:42,178 INFO L225 Difference]: With dead ends: 38 [2021-05-02 17:38:42,178 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 17:38:42,178 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2021-05-02 17:38:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 17:38:42,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 17:38:42,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 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 17:38:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-05-02 17:38:42,181 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2021-05-02 17:38:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:42,181 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-05-02 17:38:42,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:42,181 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-05-02 17:38:42,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 17:38:42,182 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:42,182 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:42,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 17:38:42,383 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:42,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:42,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1611712885, now seen corresponding path program 3 times [2021-05-02 17:38:42,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:42,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429023362] [2021-05-02 17:38:42,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:42,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:42,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:42,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429023362] [2021-05-02 17:38:42,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429023362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:42,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223861638] [2021-05-02 17:38:42,570 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:42,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-02 17:38:42,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:38:42,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 17:38:42,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:42,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:42,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223861638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:42,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:42,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-02 17:38:42,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585348822] [2021-05-02 17:38:42,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 17:38:42,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:42,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 17:38:42,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:38:42,757 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:42,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:42,940 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-05-02 17:38:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:38:42,941 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-02 17:38:42,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:42,941 INFO L225 Difference]: With dead ends: 41 [2021-05-02 17:38:42,941 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 17:38:42,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-05-02 17:38:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 17:38:42,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-05-02 17:38:42,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 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 17:38:42,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 17:38:42,944 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2021-05-02 17:38:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:42,944 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 17:38:42,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 17:38:42,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 17:38:42,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:42,945 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:43,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:43,157 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:43,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:43,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1658725865, now seen corresponding path program 4 times [2021-05-02 17:38:43,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:43,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542279314] [2021-05-02 17:38:43,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:43,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:43,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:43,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542279314] [2021-05-02 17:38:43,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542279314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:43,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402643197] [2021-05-02 17:38:43,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:43,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:38:43,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:38:43,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 17:38:43,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:43,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:43,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:43,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:43,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:43,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:43,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:43,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:43,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:43,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:43,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:43,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:43,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:43,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:43,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:43,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:43,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:43,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402643197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:43,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:43,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 17:38:43,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104059137] [2021-05-02 17:38:43,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 17:38:43,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:43,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 17:38:43,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:38:43,330 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:43,544 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-05-02 17:38:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 17:38:43,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-02 17:38:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:43,545 INFO L225 Difference]: With dead ends: 44 [2021-05-02 17:38:43,545 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 17:38:43,546 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:38:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 17:38:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-02 17:38:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 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 17:38:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-05-02 17:38:43,548 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2021-05-02 17:38:43,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:43,548 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-05-02 17:38:43,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:43,549 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-05-02 17:38:43,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 17:38:43,549 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:43,549 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:43,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 17:38:43,761 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:43,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:43,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2063074549, now seen corresponding path program 5 times [2021-05-02 17:38:43,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:43,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939185550] [2021-05-02 17:38:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 17:38:43,771 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 17:38:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 17:38:43,779 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 17:38:43,797 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 17:38:43,797 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 17:38:43,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 17:38:43,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:38:43 BasicIcfg [2021-05-02 17:38:43,834 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:38:43,834 INFO L168 Benchmark]: Toolchain (without parser) took 7058.81 ms. Allocated memory was 223.3 MB in the beginning and 271.6 MB in the end (delta: 48.2 MB). Free memory was 188.7 MB in the beginning and 233.8 MB in the end (delta: -45.0 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-02 17:38:43,835 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 223.3 MB. Free memory is still 205.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:38:43,835 INFO L168 Benchmark]: CACSL2BoogieTranslator took 132.20 ms. Allocated memory is still 223.3 MB. Free memory was 188.5 MB in the beginning and 179.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 17:38:43,835 INFO L168 Benchmark]: Boogie Preprocessor took 52.89 ms. Allocated memory is still 223.3 MB. Free memory was 179.1 MB in the beginning and 206.6 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-02 17:38:43,835 INFO L168 Benchmark]: RCFGBuilder took 297.56 ms. Allocated memory is still 223.3 MB. Free memory was 206.2 MB in the beginning and 193.0 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:38:43,835 INFO L168 Benchmark]: IcfgTransformer took 12.75 ms. Allocated memory is still 223.3 MB. Free memory was 193.0 MB in the beginning and 191.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 17:38:43,835 INFO L168 Benchmark]: TraceAbstraction took 6559.49 ms. Allocated memory was 223.3 MB in the beginning and 271.6 MB in the end (delta: 48.2 MB). Free memory was 191.2 MB in the beginning and 233.8 MB in the end (delta: -42.6 MB). Peak memory consumption was 5.3 MB. Max. memory is 8.0 GB. [2021-05-02 17:38:43,835 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 223.3 MB. Free memory is still 205.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 132.20 ms. Allocated memory is still 223.3 MB. Free memory was 188.5 MB in the beginning and 179.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 52.89 ms. Allocated memory is still 223.3 MB. Free memory was 179.1 MB in the beginning and 206.6 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 297.56 ms. Allocated memory is still 223.3 MB. Free memory was 206.2 MB in the beginning and 193.0 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 12.75 ms. Allocated memory is still 223.3 MB. Free memory was 193.0 MB in the beginning and 191.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6559.49 ms. Allocated memory was 223.3 MB in the beginning and 271.6 MB in the end (delta: 48.2 MB). Free memory was 191.2 MB in the beginning and 233.8 MB in the end (delta: -42.6 MB). Peak memory consumption was 5.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, n=10, n=0] [L24] COND TRUE i<=n VAL [i=1, n=10, n=0] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=1, n=2, n=10] [L24] i++ VAL [i=2, n=2, n=10] [L24] COND TRUE i<=n VAL [i=2, n=10, n=2] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=2, n=4, n=10] [L24] i++ VAL [i=3, n=10, n=4] [L24] COND TRUE i<=n VAL [i=3, n=10, n=4] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=3, n=10, n=6] [L24] i++ VAL [i=4, n=10, n=6] [L24] COND TRUE i<=n VAL [i=4, n=10, n=6] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=4, n=8, n=10] [L24] i++ VAL [i=5, n=10, n=8] [L24] COND TRUE i<=n VAL [i=5, n=10, n=8] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=5, n=10, n=10] [L24] i++ VAL [i=6, n=10, n=10] [L24] COND TRUE i<=n VAL [i=6, n=10, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=6, n=10, n=12] [L24] i++ VAL [i=7, n=12, n=10] [L24] COND TRUE i<=n VAL [i=7, n=12, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=7, n=10, n=14] [L24] i++ VAL [i=8, n=14, n=10] [L24] COND TRUE i<=n VAL [i=8, n=14, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=8, n=10, n=16] [L24] i++ VAL [i=9, n=10, n=16] [L24] COND TRUE i<=n VAL [i=9, n=16, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=9, n=10, n=18] [L24] i++ VAL [i=10, n=10, n=18] [L24] COND TRUE i<=n VAL [i=10, n=10, n=18] [L25] COND FALSE !(i<10) VAL [i=10, n=10, n=18] [L24] i++ VAL [i=11, n=18, n=10] [L24] COND FALSE !(i<=n) VAL [i=11, n=18, n=10] [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6494.6ms, OverallIterations: 10, TraceHistogramMax: 10, EmptinessCheckTime: 10.4ms, AutomataDifference: 2490.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 99 SDtfs, 236 SDslu, 283 SDs, 0 SdLazy, 839 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 476.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 354 GetRequests, 182 SyntacticMatches, 2 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 2591.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=9, InterpolantAutomatonStates: 102, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 29.4ms AutomataMinimizationTime, 9 MinimizatonAttempts, 7 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 57.2ms SsaConstructionTime, 238.0ms SatisfiabilityAnalysisTime, 1852.9ms InterpolantComputationTime, 439 NumberOfCodeBlocks, 439 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 382 ConstructedInterpolants, 0 QuantifiedInterpolants, 1590 SizeOfPredicates, 6 NumberOfNonLiveVariables, 739 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 117/716 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...