/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/nla-digbench-scaling/divbin2_unwindbound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:03:25,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:03:25,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:03:25,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 20:03:25,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:03:25,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:03:25,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:03:25,940 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:03:25,958 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:03:25,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:03:25,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:03:25,961 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:03:25,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:03:25,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:03:25,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:03:25,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:03:25,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:03:25,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:03:25,962 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:03:25,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:03:25,963 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:03:25,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:03:25,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:03:25,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:03:25,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:03:25,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:03:25,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:03:25,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:03:25,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:03:25,965 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:03:25,965 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:03:26,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:03:26,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:03:26,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:03:26,288 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:03:26,292 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:03:26,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i [2021-05-02 20:03:26,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/069bfa79b/05e9d19aa5424153ba5e0ed3993aa6c3/FLAG6b3c68ca7 [2021-05-02 20:03:26,884 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:03:26,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i [2021-05-02 20:03:26,892 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/069bfa79b/05e9d19aa5424153ba5e0ed3993aa6c3/FLAG6b3c68ca7 [2021-05-02 20:03:27,353 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/069bfa79b/05e9d19aa5424153ba5e0ed3993aa6c3 [2021-05-02 20:03:27,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:03:27,362 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:03:27,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:03:27,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:03:27,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:03:27,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:03:27" (1/1) ... [2021-05-02 20:03:27,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dfe3429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:27, skipping insertion in model container [2021-05-02 20:03:27,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:03:27" (1/1) ... [2021-05-02 20:03:27,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:03:27,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:03:27,503 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i[959,972] [2021-05-02 20:03:27,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:03:27,523 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:03:27,568 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i[959,972] [2021-05-02 20:03:27,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:03:27,598 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:03:27,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:27 WrapperNode [2021-05-02 20:03:27,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:03:27,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:03:27,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:03:27,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:03:27,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:27" (1/1) ... [2021-05-02 20:03:27,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:27" (1/1) ... [2021-05-02 20:03:27,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:27" (1/1) ... [2021-05-02 20:03:27,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:27" (1/1) ... [2021-05-02 20:03:27,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:27" (1/1) ... [2021-05-02 20:03:27,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:27" (1/1) ... [2021-05-02 20:03:27,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:27" (1/1) ... [2021-05-02 20:03:27,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:03:27,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:03:27,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:03:27,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:03:27,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:27" (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 20:03:27,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:03:27,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:03:27,717 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:03:27,718 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:03:27,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:03:27,718 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:03:27,718 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:03:27,718 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:03:27,718 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 20:03:27,719 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 20:03:27,719 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:03:27,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:03:27,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:03:27,720 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:03:27,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:03:27,720 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:03:27,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:03:27,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:03:27,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:03:27,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:03:27,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:03:27,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:03:28,049 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:03:28,050 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:03:28,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:03:28 BoogieIcfgContainer [2021-05-02 20:03:28,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:03:28,061 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:03:28,061 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:03:28,062 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:03:28,065 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:03:28" (1/1) ... [2021-05-02 20:03:28,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:03:28 BasicIcfg [2021-05-02 20:03:28,086 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:03:28,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:03:28,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:03:28,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:03:28,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:03:27" (1/4) ... [2021-05-02 20:03:28,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c592aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:03:28, skipping insertion in model container [2021-05-02 20:03:28,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:27" (2/4) ... [2021-05-02 20:03:28,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c592aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:03:28, skipping insertion in model container [2021-05-02 20:03:28,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:03:28" (3/4) ... [2021-05-02 20:03:28,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c592aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:03:28, skipping insertion in model container [2021-05-02 20:03:28,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:03:28" (4/4) ... [2021-05-02 20:03:28,096 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound5.iJordan [2021-05-02 20:03:28,101 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:03:28,105 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:03:28,119 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:03:28,144 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:03:28,145 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:03:28,145 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:03:28,145 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:03:28,145 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:03:28,145 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:03:28,145 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:03:28,145 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:03:28,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:03:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 20:03:28,172 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:28,172 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:28,173 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:28,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2097950667, now seen corresponding path program 1 times [2021-05-02 20:03:28,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:28,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453530515] [2021-05-02 20:03:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:28,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:03:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:28,449 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 20:03:28,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:28,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453530515] [2021-05-02 20:03:28,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453530515] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:03:28,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:03:28,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:03:28,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563007419] [2021-05-02 20:03:28,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:03:28,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:28,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:03:28,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:03:28,475 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:03:28,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:28,599 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-05-02 20:03:28,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:03:28,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 20:03:28,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:28,612 INFO L225 Difference]: With dead ends: 27 [2021-05-02 20:03:28,612 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 20:03:28,615 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:03:28,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 20:03:28,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 20:03:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-05-02 20:03:28,647 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-05-02 20:03:28,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:28,648 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-05-02 20:03:28,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:03:28,649 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-05-02 20:03:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 20:03:28,650 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:28,650 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:28,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:03:28,651 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:28,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:28,651 INFO L82 PathProgramCache]: Analyzing trace with hash 923003056, now seen corresponding path program 1 times [2021-05-02 20:03:28,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:28,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140522858] [2021-05-02 20:03:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:28,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:03:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:28,773 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 20:03:28,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:28,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140522858] [2021-05-02 20:03:28,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140522858] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:03:28,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:03:28,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:03:28,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150781796] [2021-05-02 20:03:28,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:03:28,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:28,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:03:28,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:03:28,777 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:03:28,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:28,848 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2021-05-02 20:03:28,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:03:28,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 20:03:28,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:28,849 INFO L225 Difference]: With dead ends: 23 [2021-05-02 20:03:28,849 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 20:03:28,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:03:28,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 20:03:28,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 20:03:28,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:28,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-05-02 20:03:28,854 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2021-05-02 20:03:28,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:28,855 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-05-02 20:03:28,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:03:28,855 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-05-02 20:03:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 20:03:28,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:28,856 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:28,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:03:28,856 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:28,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:28,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1207414063, now seen corresponding path program 1 times [2021-05-02 20:03:28,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:28,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853889230] [2021-05-02 20:03:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:28,870 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:28,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221252114] [2021-05-02 20:03:28,871 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 20:03:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:28,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:03:28,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:28,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:28,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:28,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:29,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:29,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:29,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:29,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:29,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:29,055 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 20:03:29,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:29,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853889230] [2021-05-02 20:03:29,056 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:29,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221252114] [2021-05-02 20:03:29,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221252114] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:03:29,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:03:29,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:03:29,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152668176] [2021-05-02 20:03:29,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:03:29,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:29,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:03:29,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:03:29,058 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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 20:03:29,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:29,089 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-05-02 20:03:29,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:03:29,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) Word has length 15 [2021-05-02 20:03:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:29,093 INFO L225 Difference]: With dead ends: 27 [2021-05-02 20:03:29,093 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:03:29,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:03:29,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:03:29,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 20:03:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:29,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-05-02 20:03:29,098 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2021-05-02 20:03:29,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:29,098 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-05-02 20:03:29,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 20:03:29,098 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-05-02 20:03:29,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 20:03:29,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:29,099 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:29,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 20:03:29,300 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:29,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:29,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1208546121, now seen corresponding path program 1 times [2021-05-02 20:03:29,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:29,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587302652] [2021-05-02 20:03:29,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:29,312 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:29,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904839229] [2021-05-02 20:03:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:03:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:29,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:03:29,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:29,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:29,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:29,529 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 20:03:29,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:29,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587302652] [2021-05-02 20:03:29,529 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:29,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904839229] [2021-05-02 20:03:29,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904839229] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:03:29,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:03:29,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:03:29,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916167798] [2021-05-02 20:03:29,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:03:29,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:29,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:03:29,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:03:29,532 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 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 20:03:29,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:29,580 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-05-02 20:03:29,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:03:29,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 20:03:29,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:29,584 INFO L225 Difference]: With dead ends: 33 [2021-05-02 20:03:29,585 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:03:29,585 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:03:29,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:03:29,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:03:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:03:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-05-02 20:03:29,598 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2021-05-02 20:03:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:29,598 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-05-02 20:03:29,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 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 20:03:29,598 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-05-02 20:03:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 20:03:29,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:29,601 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:29,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:29,827 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:29,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1227316531, now seen corresponding path program 1 times [2021-05-02 20:03:29,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:29,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026121205] [2021-05-02 20:03:29,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:29,838 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:29,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715291938] [2021-05-02 20:03:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:03:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:29,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:03:29,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:29,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:29,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:29,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:29,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:29,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:29,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:29,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:29,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:03:29,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:29,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026121205] [2021-05-02 20:03:29,998 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:29,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715291938] [2021-05-02 20:03:29,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715291938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:03:29,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:03:29,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:03:29,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268105461] [2021-05-02 20:03:29,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:03:29,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:29,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:03:29,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:03:30,000 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:03:30,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:30,028 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-02 20:03:30,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:03:30,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 20:03:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:30,029 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:03:30,029 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:03:30,030 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:03:30,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:03:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 20:03:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:03:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-02 20:03:30,033 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 17 [2021-05-02 20:03:30,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:30,034 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-02 20:03:30,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:03:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-02 20:03:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:03:30,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:30,035 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:30,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:30,249 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:30,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:30,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2051197196, now seen corresponding path program 1 times [2021-05-02 20:03:30,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:30,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282495594] [2021-05-02 20:03:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:30,262 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:30,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852843843] [2021-05-02 20:03:30,263 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 20:03:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:30,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:03:30,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:30,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:30,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:30,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:30,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:30,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:30,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:30,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:30,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:30,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:30,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:30,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:03:30,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:30,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282495594] [2021-05-02 20:03:30,422 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:30,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852843843] [2021-05-02 20:03:30,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852843843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:03:30,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:03:30,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:03:30,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452915790] [2021-05-02 20:03:30,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:03:30,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:30,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:03:30,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:03:30,425 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 20:03:30,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:30,461 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-05-02 20:03:30,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:03:30,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) Word has length 18 [2021-05-02 20:03:30,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:30,464 INFO L225 Difference]: With dead ends: 39 [2021-05-02 20:03:30,464 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 20:03:30,466 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:03:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 20:03:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-02 20:03:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 30 states have internal predecessors, (38), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:03:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-05-02 20:03:30,474 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 18 [2021-05-02 20:03:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:30,474 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-05-02 20:03:30,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 20:03:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-05-02 20:03:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:03:30,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:30,475 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:30,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:30,676 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:30,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:30,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2052329254, now seen corresponding path program 1 times [2021-05-02 20:03:30,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:30,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350184839] [2021-05-02 20:03:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:30,691 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:30,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000001083] [2021-05-02 20:03:30,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:03:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:30,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:03:30,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:30,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:30,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:03:30,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:30,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350184839] [2021-05-02 20:03:30,886 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:30,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000001083] [2021-05-02 20:03:30,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000001083] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:03:30,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:03:30,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:03:30,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817757789] [2021-05-02 20:03:30,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:03:30,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:30,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:03:30,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:03:30,891 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 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 20:03:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:30,960 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2021-05-02 20:03:30,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:03:30,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 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 18 [2021-05-02 20:03:30,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:30,964 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:03:30,964 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 20:03:30,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:03:30,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 20:03:30,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-05-02 20:03:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:03:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-05-02 20:03:30,973 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 18 [2021-05-02 20:03:30,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:30,974 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-05-02 20:03:30,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 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 20:03:30,974 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-05-02 20:03:30,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 20:03:30,981 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:30,981 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:31,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 20:03:31,206 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:31,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:31,207 INFO L82 PathProgramCache]: Analyzing trace with hash 462666167, now seen corresponding path program 1 times [2021-05-02 20:03:31,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:31,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020610868] [2021-05-02 20:03:31,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:31,217 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:31,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562100002] [2021-05-02 20:03:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:03:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:31,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:03:31,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:03:31,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:31,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020610868] [2021-05-02 20:03:31,348 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:31,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562100002] [2021-05-02 20:03:31,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562100002] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:03:31,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:03:31,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:03:31,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256115258] [2021-05-02 20:03:31,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:03:31,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:31,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:03:31,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:03:31,350 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:31,379 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-05-02 20:03:31,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:03:31,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-05-02 20:03:31,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:31,380 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:03:31,380 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:03:31,380 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:03:31,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:03:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:03:31,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:03:31,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-05-02 20:03:31,383 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2021-05-02 20:03:31,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:31,383 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-05-02 20:03:31,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:31,383 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-05-02 20:03:31,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 20:03:31,384 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:31,384 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:31,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:31,601 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:31,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:31,601 INFO L82 PathProgramCache]: Analyzing trace with hash -269721504, now seen corresponding path program 1 times [2021-05-02 20:03:31,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:31,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916567933] [2021-05-02 20:03:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:31,610 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:31,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951084441] [2021-05-02 20:03:31,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:03:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:31,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:03:31,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:31,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:31,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:31,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:31,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:31,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:31,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:31,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:31,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:31,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:31,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:31,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:31,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:31,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:31,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:03:31,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:31,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916567933] [2021-05-02 20:03:31,743 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:31,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951084441] [2021-05-02 20:03:31,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951084441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:03:31,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:03:31,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:03:31,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925151613] [2021-05-02 20:03:31,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:03:31,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:31,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:03:31,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:03:31,745 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:31,777 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-05-02 20:03:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:03:31,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-05-02 20:03:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:31,778 INFO L225 Difference]: With dead ends: 53 [2021-05-02 20:03:31,778 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 20:03:31,778 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:03:31,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 20:03:31,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-05-02 20:03:31,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:03:31,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-05-02 20:03:31,782 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 27 [2021-05-02 20:03:31,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:31,782 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-05-02 20:03:31,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:31,782 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-05-02 20:03:31,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 20:03:31,783 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:31,783 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:31,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:31,997 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:31,997 INFO L82 PathProgramCache]: Analyzing trace with hash -268589446, now seen corresponding path program 1 times [2021-05-02 20:03:31,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:31,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127208100] [2021-05-02 20:03:31,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:32,005 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:32,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830799507] [2021-05-02 20:03:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:32,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:03:32,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:32,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:32,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:32,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:32,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:03:32,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:32,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127208100] [2021-05-02 20:03:32,264 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:32,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830799507] [2021-05-02 20:03:32,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830799507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:03:32,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:03:32,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:03:32,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523979349] [2021-05-02 20:03:32,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:03:32,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:32,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:03:32,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:03:32,266 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:32,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:32,427 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-05-02 20:03:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:03:32,427 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-05-02 20:03:32,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:32,428 INFO L225 Difference]: With dead ends: 62 [2021-05-02 20:03:32,428 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 20:03:32,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:03:32,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 20:03:32,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2021-05-02 20:03:32,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.225) internal successors, (49), 41 states have internal predecessors, (49), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:03:32,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-05-02 20:03:32,432 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 27 [2021-05-02 20:03:32,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:32,433 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-05-02 20:03:32,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:32,433 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-05-02 20:03:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:03:32,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:32,434 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:32,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 20:03:32,649 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:32,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1346351076, now seen corresponding path program 1 times [2021-05-02 20:03:32,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:32,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869149648] [2021-05-02 20:03:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:32,658 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:32,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449384039] [2021-05-02 20:03:32,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:32,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:03:32,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:32,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:32,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:32,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:32,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:32,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:32,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:32,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:32,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:32,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:32,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:32,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:03:32,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:32,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869149648] [2021-05-02 20:03:32,770 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:32,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449384039] [2021-05-02 20:03:32,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449384039] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:03:32,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:03:32,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:03:32,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557941208] [2021-05-02 20:03:32,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:03:32,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:32,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:03:32,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:03:32,772 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:32,801 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-05-02 20:03:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:03:32,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-05-02 20:03:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:32,803 INFO L225 Difference]: With dead ends: 55 [2021-05-02 20:03:32,803 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 20:03:32,803 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:03:32,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 20:03:32,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 20:03:32,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 43 states have internal predecessors, (51), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:03:32,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-05-02 20:03:32,807 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 29 [2021-05-02 20:03:32,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:32,807 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-05-02 20:03:32,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:32,807 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-05-02 20:03:32,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 20:03:32,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:32,808 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:33,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:33,017 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:33,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:33,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1031563075, now seen corresponding path program 2 times [2021-05-02 20:03:33,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:33,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224910113] [2021-05-02 20:03:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:33,026 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:33,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261112125] [2021-05-02 20:03:33,026 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:33,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:03:33,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:03:33,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:03:33,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:33,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:03:33,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:33,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224910113] [2021-05-02 20:03:33,192 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:33,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261112125] [2021-05-02 20:03:33,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261112125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:03:33,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:03:33,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:03:33,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503645299] [2021-05-02 20:03:33,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:03:33,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:33,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:03:33,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:03:33,195 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:33,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:33,242 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2021-05-02 20:03:33,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:03:33,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-05-02 20:03:33,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:33,244 INFO L225 Difference]: With dead ends: 74 [2021-05-02 20:03:33,244 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 20:03:33,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:03:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 20:03:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-05-02 20:03:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 54 states have internal predecessors, (65), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:03:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-05-02 20:03:33,248 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 30 [2021-05-02 20:03:33,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:33,249 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-05-02 20:03:33,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:33,249 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-05-02 20:03:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 20:03:33,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:33,250 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:33,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:33,457 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:33,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:33,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1030431017, now seen corresponding path program 2 times [2021-05-02 20:03:33,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:33,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469780228] [2021-05-02 20:03:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:33,489 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:33,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99659624] [2021-05-02 20:03:33,489 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:33,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:03:33,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:03:33,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 20:03:33,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:33,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:03:33,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:33,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469780228] [2021-05-02 20:03:33,845 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:33,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99659624] [2021-05-02 20:03:33,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99659624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:03:33,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:03:33,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:03:33,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615285756] [2021-05-02 20:03:33,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:03:33,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:33,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:03:33,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:03:33,849 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:34,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:34,057 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2021-05-02 20:03:34,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:03:34,057 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-05-02 20:03:34,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:34,058 INFO L225 Difference]: With dead ends: 93 [2021-05-02 20:03:34,059 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 20:03:34,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:03:34,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 20:03:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2021-05-02 20:03:34,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:03:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2021-05-02 20:03:34,065 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 30 [2021-05-02 20:03:34,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:34,065 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2021-05-02 20:03:34,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:34,065 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2021-05-02 20:03:34,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:03:34,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:34,067 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:34,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:03:34,287 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:34,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:34,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1111952806, now seen corresponding path program 3 times [2021-05-02 20:03:34,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:34,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817143666] [2021-05-02 20:03:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:34,295 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:34,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269047280] [2021-05-02 20:03:34,295 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:35,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:03:35,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:03:35,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 20:03:35,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:35,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:35,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:35,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:35,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:03:35,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:35,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817143666] [2021-05-02 20:03:35,453 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:35,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269047280] [2021-05-02 20:03:35,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269047280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:03:35,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:03:35,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:03:35,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081560674] [2021-05-02 20:03:35,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:03:35,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:35,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:03:35,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:03:35,455 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:03:35,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:35,502 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2021-05-02 20:03:35,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:03:35,503 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2021-05-02 20:03:35,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:35,507 INFO L225 Difference]: With dead ends: 71 [2021-05-02 20:03:35,507 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 20:03:35,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:03:35,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 20:03:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-05-02 20:03:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:03:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-05-02 20:03:35,518 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 36 [2021-05-02 20:03:35,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:35,518 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-05-02 20:03:35,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:03:35,518 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-05-02 20:03:35,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:03:35,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:35,520 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:35,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:03:35,725 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:35,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:35,726 INFO L82 PathProgramCache]: Analyzing trace with hash 954968015, now seen corresponding path program 3 times [2021-05-02 20:03:35,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:35,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332483260] [2021-05-02 20:03:35,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:35,735 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:35,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659684883] [2021-05-02 20:03:35,735 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:36,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:03:36,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:03:36,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 20:03:36,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:36,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:36,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:36,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:36,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:36,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:36,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:03:36,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:36,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332483260] [2021-05-02 20:03:36,710 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:36,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659684883] [2021-05-02 20:03:36,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659684883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:03:36,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:03:36,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:03:36,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171338909] [2021-05-02 20:03:36,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:03:36,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:36,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:03:36,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:03:36,711 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:03:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:36,973 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2021-05-02 20:03:36,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:03:36,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2021-05-02 20:03:36,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:36,974 INFO L225 Difference]: With dead ends: 79 [2021-05-02 20:03:36,974 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 20:03:36,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:03:36,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 20:03:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2021-05-02 20:03:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.18) internal successors, (59), 51 states have internal predecessors, (59), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:03:36,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-05-02 20:03:36,978 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 39 [2021-05-02 20:03:36,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:36,978 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-05-02 20:03:36,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:03:36,978 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-05-02 20:03:36,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:03:36,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:36,979 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:37,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 20:03:37,180 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:37,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1223907629, now seen corresponding path program 2 times [2021-05-02 20:03:37,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:37,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453240020] [2021-05-02 20:03:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:37,188 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:37,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456753546] [2021-05-02 20:03:37,188 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:37,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:03:37,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:03:37,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:03:37,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:37,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 20:03:37,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:37,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453240020] [2021-05-02 20:03:37,355 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:37,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456753546] [2021-05-02 20:03:37,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456753546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:03:37,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:03:37,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:03:37,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488918103] [2021-05-02 20:03:37,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:03:37,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:37,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:03:37,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:03:37,357 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:37,393 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-05-02 20:03:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:03:37,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-05-02 20:03:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:37,394 INFO L225 Difference]: With dead ends: 67 [2021-05-02 20:03:37,394 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 20:03:37,394 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:03:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 20:03:37,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-02 20:03:37,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:03:37,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2021-05-02 20:03:37,397 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 41 [2021-05-02 20:03:37,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:37,398 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2021-05-02 20:03:37,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:37,398 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2021-05-02 20:03:37,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:03:37,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:37,398 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:37,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:37,613 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:37,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:37,613 INFO L82 PathProgramCache]: Analyzing trace with hash 805846188, now seen corresponding path program 4 times [2021-05-02 20:03:37,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:37,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431996848] [2021-05-02 20:03:37,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:37,622 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:37,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390809320] [2021-05-02 20:03:37,622 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:37,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:03:37,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:03:37,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:03:37,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:37,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:03:37,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:37,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431996848] [2021-05-02 20:03:37,813 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:37,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390809320] [2021-05-02 20:03:37,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390809320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:03:37,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:03:37,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:03:37,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734296637] [2021-05-02 20:03:37,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:03:37,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:37,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:03:37,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:03:37,815 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:03:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:37,849 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-05-02 20:03:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:03:37,850 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2021-05-02 20:03:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:37,850 INFO L225 Difference]: With dead ends: 53 [2021-05-02 20:03:37,850 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:03:37,851 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:03:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:03:37,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:03:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:03:37,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:03:37,851 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2021-05-02 20:03:37,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:37,851 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:03:37,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:03:37,852 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:03:37,852 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:03:38,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:03:38,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:03:38 BasicIcfg [2021-05-02 20:03:38,076 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:03:38,077 INFO L168 Benchmark]: Toolchain (without parser) took 10715.15 ms. Allocated memory was 209.7 MB in the beginning and 270.5 MB in the end (delta: 60.8 MB). Free memory was 174.7 MB in the beginning and 117.1 MB in the end (delta: 57.7 MB). Peak memory consumption was 118.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:03:38,077 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 209.7 MB. Free memory is still 191.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:03:38,077 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.69 ms. Allocated memory is still 209.7 MB. Free memory was 174.5 MB in the beginning and 192.6 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:03:38,077 INFO L168 Benchmark]: Boogie Preprocessor took 41.24 ms. Allocated memory is still 209.7 MB. Free memory was 192.6 MB in the beginning and 191.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:03:38,077 INFO L168 Benchmark]: RCFGBuilder took 409.69 ms. Allocated memory is still 209.7 MB. Free memory was 191.2 MB in the beginning and 175.4 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:03:38,077 INFO L168 Benchmark]: IcfgTransformer took 25.91 ms. Allocated memory is still 209.7 MB. Free memory was 175.4 MB in the beginning and 174.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:03:38,077 INFO L168 Benchmark]: TraceAbstraction took 9988.10 ms. Allocated memory was 209.7 MB in the beginning and 270.5 MB in the end (delta: 60.8 MB). Free memory was 173.7 MB in the beginning and 117.1 MB in the end (delta: 56.6 MB). Peak memory consumption was 118.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:03:38,078 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 209.7 MB. Free memory is still 191.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 231.69 ms. Allocated memory is still 209.7 MB. Free memory was 174.5 MB in the beginning and 192.6 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.24 ms. Allocated memory is still 209.7 MB. Free memory was 192.6 MB in the beginning and 191.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 409.69 ms. Allocated memory is still 209.7 MB. Free memory was 191.2 MB in the beginning and 175.4 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 25.91 ms. Allocated memory is still 209.7 MB. Free memory was 175.4 MB in the beginning and 174.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9988.10 ms. Allocated memory was 209.7 MB in the beginning and 270.5 MB in the end (delta: 60.8 MB). Free memory was 173.7 MB in the beginning and 117.1 MB in the end (delta: 56.6 MB). Peak memory consumption was 118.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9930.9ms, OverallIterations: 17, TraceHistogramMax: 4, EmptinessCheckTime: 34.1ms, AutomataDifference: 1379.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 441 SDtfs, 200 SDslu, 1382 SDs, 0 SdLazy, 904 SolverSat, 98 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 782.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 423 GetRequests, 315 SyntacticMatches, 5 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 933.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=13, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 98.9ms AutomataMinimizationTime, 17 MinimizatonAttempts, 50 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 137.8ms SsaConstructionTime, 1892.7ms SatisfiabilityAnalysisTime, 2423.3ms InterpolantComputationTime, 434 NumberOfCodeBlocks, 434 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 417 ConstructedInterpolants, 0 QuantifiedInterpolants, 2042 SizeOfPredicates, 44 NumberOfNonLiveVariables, 1918 ConjunctsInSsa, 238 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 87/181 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...