/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/cohencu-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:31:07,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:31:07,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:31:07,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:31:07,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:31:07,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:31:07,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:31:07,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:31:07,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:31:07,278 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:31:07,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:31:07,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:31:07,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:31:07,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:31:07,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:31:07,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:31:07,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:31:07,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:31:07,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:31:07,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:31:07,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:31:07,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:31:07,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:31:07,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:31:07,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:31:07,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:31:07,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:31:07,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:31:07,302 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:31:07,311 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:31:07,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:31:07,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:31:07,313 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:31:07,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:31:07,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:31:07,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:31:07,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:31:07,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:31:07,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:31:07,314 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:31:07,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:31:07,314 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:31:07,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:31:07,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:31:07,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:31:07,315 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:31:07,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:31:07,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:31:07,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:31:07,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:31:07,317 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:31:07,317 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:31:07,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:31:07,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:31:07,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:31:07,671 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:31:07,672 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:31:07,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound2.c [2021-05-02 19:31:07,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d241e4d6/87ca44af90b84c7b9d32a9683353cca7/FLAG8be010d3f [2021-05-02 19:31:08,165 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:31:08,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound2.c [2021-05-02 19:31:08,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d241e4d6/87ca44af90b84c7b9d32a9683353cca7/FLAG8be010d3f [2021-05-02 19:31:08,184 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d241e4d6/87ca44af90b84c7b9d32a9683353cca7 [2021-05-02 19:31:08,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:31:08,188 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:31:08,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:31:08,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:31:08,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:31:08,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:31:08" (1/1) ... [2021-05-02 19:31:08,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7663e77a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:31:08, skipping insertion in model container [2021-05-02 19:31:08,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:31:08" (1/1) ... [2021-05-02 19:31:08,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:31:08,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:31:08,323 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/cohencu-ll_unwindbound2.c[596,609] [2021-05-02 19:31:08,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:31:08,352 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:31:08,387 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/cohencu-ll_unwindbound2.c[596,609] [2021-05-02 19:31:08,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:31:08,434 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:31:08,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:31:08 WrapperNode [2021-05-02 19:31:08,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:31:08,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:31:08,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:31:08,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:31:08,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:31:08" (1/1) ... [2021-05-02 19:31:08,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:31:08" (1/1) ... [2021-05-02 19:31:08,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:31:08" (1/1) ... [2021-05-02 19:31:08,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:31:08" (1/1) ... [2021-05-02 19:31:08,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:31:08" (1/1) ... [2021-05-02 19:31:08,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:31:08" (1/1) ... [2021-05-02 19:31:08,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:31:08" (1/1) ... [2021-05-02 19:31:08,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:31:08,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:31:08,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:31:08,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:31:08,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:31:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:31:08,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:31:08,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:31:08,556 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:31:08,557 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:31:08,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:31:08,557 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:31:08,557 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:31:08,557 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:31:08,557 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:31:08,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:31:08,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-02 19:31:08,558 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:31:08,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:31:08,559 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:31:08,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:31:08,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:31:08,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:31:08,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:31:08,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:31:08,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:31:08,863 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:31:08,864 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:31:08,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:31:08 BoogieIcfgContainer [2021-05-02 19:31:08,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:31:08,866 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:31:08,866 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:31:08,867 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:31:08,877 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:31:08" (1/1) ... [2021-05-02 19:31:08,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:31:08 BasicIcfg [2021-05-02 19:31:08,899 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:31:08,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:31:08,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:31:08,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:31:08,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:31:08" (1/4) ... [2021-05-02 19:31:08,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7771612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:31:08, skipping insertion in model container [2021-05-02 19:31:08,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:31:08" (2/4) ... [2021-05-02 19:31:08,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7771612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:31:08, skipping insertion in model container [2021-05-02 19:31:08,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:31:08" (3/4) ... [2021-05-02 19:31:08,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7771612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:31:08, skipping insertion in model container [2021-05-02 19:31:08,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:31:08" (4/4) ... [2021-05-02 19:31:08,910 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound2.cJordan [2021-05-02 19:31:08,914 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:31:08,919 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:31:08,933 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:31:08,956 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:31:08,956 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:31:08,956 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:31:08,956 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:31:08,956 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:31:08,956 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:31:08,956 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:31:08,957 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:31:08,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 19:31:08,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 19:31:08,978 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:08,979 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:08,979 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:08,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:08,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1427487266, now seen corresponding path program 1 times [2021-05-02 19:31:08,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:08,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414193026] [2021-05-02 19:31:08,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:09,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:31:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:31:09,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:09,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414193026] [2021-05-02 19:31:09,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414193026] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:31:09,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:31:09,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:31:09,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068531956] [2021-05-02 19:31:09,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:31:09,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:09,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:31:09,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:31:09,214 INFO L87 Difference]: Start difference. First operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:31:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:09,347 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-05-02 19:31:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:31:09,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 19:31:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:09,362 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:31:09,362 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 19:31:09,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:31:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 19:31:09,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 19:31:09,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:31:09,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2021-05-02 19:31:09,392 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2021-05-02 19:31:09,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:09,392 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2021-05-02 19:31:09,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:31:09,393 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2021-05-02 19:31:09,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:31:09,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:09,393 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:09,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:31:09,394 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:09,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:09,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1331862890, now seen corresponding path program 1 times [2021-05-02 19:31:09,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:09,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331131080] [2021-05-02 19:31:09,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:09,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:31:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:31:09,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:09,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331131080] [2021-05-02 19:31:09,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331131080] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:31:09,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:31:09,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:31:09,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050360427] [2021-05-02 19:31:09,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:31:09,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:09,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:31:09,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:31:09,531 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:31:09,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:09,651 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-05-02 19:31:09,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:31:09,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2021-05-02 19:31:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:09,653 INFO L225 Difference]: With dead ends: 28 [2021-05-02 19:31:09,654 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 19:31:09,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:31:09,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 19:31:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 19:31:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:31:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2021-05-02 19:31:09,669 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 12 [2021-05-02 19:31:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:09,670 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2021-05-02 19:31:09,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:31:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2021-05-02 19:31:09,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:31:09,672 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:09,672 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:09,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 19:31:09,673 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:09,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:09,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1332935366, now seen corresponding path program 1 times [2021-05-02 19:31:09,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:09,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725435804] [2021-05-02 19:31:09,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:09,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:31:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:31:09,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:09,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725435804] [2021-05-02 19:31:09,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725435804] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:31:09,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:31:09,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:31:09,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958187391] [2021-05-02 19:31:09,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:31:09,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:09,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:31:09,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:31:09,809 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:31:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:10,060 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-05-02 19:31:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:31:10,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 19:31:10,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:10,061 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:31:10,061 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 19:31:10,062 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:31:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 19:31:10,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 19:31:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:31:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 19:31:10,075 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-02 19:31:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:10,075 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 19:31:10,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:31:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 19:31:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 19:31:10,077 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:10,077 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:10,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 19:31:10,077 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:10,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:10,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1273314772, now seen corresponding path program 1 times [2021-05-02 19:31:10,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:10,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117447166] [2021-05-02 19:31:10,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:10,102 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:10,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000719567] [2021-05-02 19:31:10,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:10,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:31:10,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:31:10,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:10,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117447166] [2021-05-02 19:31:10,270 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:10,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000719567] [2021-05-02 19:31:10,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000719567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:10,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:10,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:31:10,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395019022] [2021-05-02 19:31:10,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:31:10,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:10,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:31:10,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:31:10,272 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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 19:31:10,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:10,465 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-05-02 19:31:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:31:10,466 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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 17 [2021-05-02 19:31:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:10,466 INFO L225 Difference]: With dead ends: 52 [2021-05-02 19:31:10,467 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 19:31:10,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:31:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 19:31:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-02 19:31:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:31:10,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-05-02 19:31:10,474 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 17 [2021-05-02 19:31:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:10,474 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-05-02 19:31:10,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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 19:31:10,474 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-05-02 19:31:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:31:10,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:10,475 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:10,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:10,677 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:10,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1649805282, now seen corresponding path program 1 times [2021-05-02 19:31:10,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:10,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488235855] [2021-05-02 19:31:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:10,695 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:10,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10582446] [2021-05-02 19:31:10,696 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 19:31:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:10,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:31:10,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:31:10,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:10,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488235855] [2021-05-02 19:31:10,841 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:10,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10582446] [2021-05-02 19:31:10,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10582446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:10,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:10,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:31:10,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067428697] [2021-05-02 19:31:10,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:31:10,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:10,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:31:10,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:31:10,843 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:31:11,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:11,049 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-05-02 19:31:11,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:31:11,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-05-02 19:31:11,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:11,050 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:31:11,050 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 19:31:11,051 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:31:11,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 19:31:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 19:31:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:31:11,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2021-05-02 19:31:11,058 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 22 [2021-05-02 19:31:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:11,058 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2021-05-02 19:31:11,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:31:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2021-05-02 19:31:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 19:31:11,059 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:11,059 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:11,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:11,265 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:11,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1442767915, now seen corresponding path program 1 times [2021-05-02 19:31:11,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:11,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965899854] [2021-05-02 19:31:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:11,274 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:11,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15304708] [2021-05-02 19:31:11,274 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 19:31:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:11,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 19:31:11,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 19:31:11,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:11,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965899854] [2021-05-02 19:31:11,436 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:11,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15304708] [2021-05-02 19:31:11,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15304708] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:11,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:11,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:31:11,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141205438] [2021-05-02 19:31:11,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:31:11,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:11,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:31:11,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:31:11,438 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:31:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:11,635 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2021-05-02 19:31:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:31:11,636 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-05-02 19:31:11,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:11,638 INFO L225 Difference]: With dead ends: 60 [2021-05-02 19:31:11,638 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 19:31:11,639 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:31:11,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 19:31:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 19:31:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 19:31:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-05-02 19:31:11,646 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 27 [2021-05-02 19:31:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:11,646 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-05-02 19:31:11,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:31:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-05-02 19:31:11,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 19:31:11,648 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:11,648 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:11,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:11,865 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:11,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1251454759, now seen corresponding path program 1 times [2021-05-02 19:31:11,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:11,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626397726] [2021-05-02 19:31:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:11,873 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:11,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152812893] [2021-05-02 19:31:11,874 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 19:31:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:11,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:31:11,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:11,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:11,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:11,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:12,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:12,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:12,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:12,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:12,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-05-02 19:31:12,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:12,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626397726] [2021-05-02 19:31:12,074 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:12,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152812893] [2021-05-02 19:31:12,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152812893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:12,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:12,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 19:31:12,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546043099] [2021-05-02 19:31:12,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:31:12,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:12,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:31:12,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:31:12,077 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:31:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:12,111 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2021-05-02 19:31:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:31:12,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 19:31:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:12,115 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:31:12,115 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 19:31:12,117 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:31:12,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 19:31:12,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 19:31:12,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 19:31:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-05-02 19:31:12,131 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2021-05-02 19:31:12,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:12,131 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-05-02 19:31:12,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:31:12,132 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-05-02 19:31:12,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 19:31:12,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:12,133 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:12,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:12,356 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:12,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:12,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1899744846, now seen corresponding path program 1 times [2021-05-02 19:31:12,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:12,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973395549] [2021-05-02 19:31:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:12,365 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:12,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820465661] [2021-05-02 19:31:12,365 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 19:31:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:12,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 19:31:12,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 19:31:12,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:12,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973395549] [2021-05-02 19:31:12,575 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:12,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820465661] [2021-05-02 19:31:12,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820465661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:12,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:12,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:31:12,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538003431] [2021-05-02 19:31:12,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:31:12,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:12,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:31:12,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:31:12,577 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:31:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:12,776 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-05-02 19:31:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:31:12,776 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 19:31:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:12,778 INFO L225 Difference]: With dead ends: 76 [2021-05-02 19:31:12,778 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 19:31:12,778 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:31:12,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 19:31:12,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-02 19:31:12,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 19:31:12,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2021-05-02 19:31:12,793 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 45 [2021-05-02 19:31:12,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:12,794 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2021-05-02 19:31:12,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:31:12,794 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2021-05-02 19:31:12,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 19:31:12,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:12,801 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:13,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:13,013 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:13,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:13,013 INFO L82 PathProgramCache]: Analyzing trace with hash 400776220, now seen corresponding path program 2 times [2021-05-02 19:31:13,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:13,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162569190] [2021-05-02 19:31:13,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:13,035 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:13,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583490623] [2021-05-02 19:31:13,035 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 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 19:31:13,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:31:13,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:31:13,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:31:13,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 19:31:13,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:13,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162569190] [2021-05-02 19:31:13,270 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:13,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583490623] [2021-05-02 19:31:13,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583490623] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:13,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:13,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:31:13,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488165531] [2021-05-02 19:31:13,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:31:13,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:13,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:31:13,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:31:13,274 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:31:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:13,485 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2021-05-02 19:31:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:31:13,486 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2021-05-02 19:31:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:13,487 INFO L225 Difference]: With dead ends: 80 [2021-05-02 19:31:13,487 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 19:31:13,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:31:13,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 19:31:13,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 19:31:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 40 states have (on average 1.1) internal successors, (44), 42 states have internal predecessors, (44), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 19:31:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2021-05-02 19:31:13,492 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 50 [2021-05-02 19:31:13,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:13,492 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2021-05-02 19:31:13,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:31:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2021-05-02 19:31:13,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 19:31:13,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:13,494 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:13,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:13,709 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:13,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:13,709 INFO L82 PathProgramCache]: Analyzing trace with hash 999510626, now seen corresponding path program 1 times [2021-05-02 19:31:13,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:13,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065157103] [2021-05-02 19:31:13,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:13,717 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:13,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144494665] [2021-05-02 19:31:13,717 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 19:31:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:13,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 19:31:13,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:13,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:13,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:13,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:13,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:13,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:13,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:13,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:13,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:13,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:13,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 51 proven. 9 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 19:31:14,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:14,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065157103] [2021-05-02 19:31:14,322 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:14,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144494665] [2021-05-02 19:31:14,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144494665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:14,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:14,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:31:14,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510631708] [2021-05-02 19:31:14,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:31:14,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:14,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:31:14,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:31:14,323 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:31:14,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:14,559 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-05-02 19:31:14,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:31:14,559 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2021-05-02 19:31:14,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:14,561 INFO L225 Difference]: With dead ends: 82 [2021-05-02 19:31:14,561 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 19:31:14,561 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:31:14,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 19:31:14,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-02 19:31:14,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 27 states have call successors, (27), 12 states have call predecessors, (27), 11 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 19:31:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2021-05-02 19:31:14,573 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 71 [2021-05-02 19:31:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:14,573 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2021-05-02 19:31:14,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:31:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2021-05-02 19:31:14,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 19:31:14,576 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:14,576 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:14,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 19:31:14,800 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:14,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:14,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1401496737, now seen corresponding path program 2 times [2021-05-02 19:31:14,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:14,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992198516] [2021-05-02 19:31:14,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:14,812 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:14,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344957433] [2021-05-02 19:31:14,813 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 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 19:31:14,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:31:14,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 19:31:14,884 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 19:31:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 19:31:14,912 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 19:31:15,017 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 19:31:15,018 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 19:31:15,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 19:31:15,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:31:15 BasicIcfg [2021-05-02 19:31:15,275 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:31:15,275 INFO L168 Benchmark]: Toolchain (without parser) took 7087.69 ms. Allocated memory was 201.3 MB in the beginning and 259.0 MB in the end (delta: 57.7 MB). Free memory was 165.5 MB in the beginning and 155.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 68.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:31:15,275 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 201.3 MB. Free memory is still 182.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:31:15,275 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.56 ms. Allocated memory is still 201.3 MB. Free memory was 165.3 MB in the beginning and 184.7 MB in the end (delta: -19.4 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. [2021-05-02 19:31:15,275 INFO L168 Benchmark]: Boogie Preprocessor took 43.49 ms. Allocated memory is still 201.3 MB. Free memory was 184.7 MB in the beginning and 183.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:31:15,275 INFO L168 Benchmark]: RCFGBuilder took 383.60 ms. Allocated memory is still 201.3 MB. Free memory was 183.0 MB in the beginning and 167.7 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:31:15,276 INFO L168 Benchmark]: IcfgTransformer took 32.87 ms. Allocated memory is still 201.3 MB. Free memory was 167.3 MB in the beginning and 166.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:31:15,276 INFO L168 Benchmark]: TraceAbstraction took 6373.47 ms. Allocated memory was 201.3 MB in the beginning and 259.0 MB in the end (delta: 57.7 MB). Free memory was 165.8 MB in the beginning and 155.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 69.3 MB. Max. memory is 8.0 GB. [2021-05-02 19:31:15,276 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 ms. Allocated memory is still 201.3 MB. Free memory is still 182.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.56 ms. Allocated memory is still 201.3 MB. Free memory was 165.3 MB in the beginning and 184.7 MB in the end (delta: -19.4 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.49 ms. Allocated memory is still 201.3 MB. Free memory was 184.7 MB in the beginning and 183.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 383.60 ms. Allocated memory is still 201.3 MB. Free memory was 183.0 MB in the beginning and 167.7 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 32.87 ms. Allocated memory is still 201.3 MB. Free memory was 167.3 MB in the beginning and 166.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6373.47 ms. Allocated memory was 201.3 MB in the beginning and 259.0 MB in the end (delta: 57.7 MB). Free memory was 165.8 MB in the beginning and 155.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 69.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=15, counter=0] [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_unsigned_short() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [\old(counter)=0, a=2, counter=0, n=0, x=0, y=1, z=6] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, counter=1, counter++=0, n=0, x=0, y=1, z=6] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=2, counter=1, n=0, x=0, y=1, z=6] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=2, counter=1, n=0, x=0, y=1, z=6] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=2, counter=1, n=0, x=0, y=1, z=6] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=2, counter=1, n=0, x=0, y=1, z=6] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=2, counter=1, n=0, x=0, y=1, z=6] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=2, counter=1, n=1, x=1, y=7, z=12] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, counter=2, counter++=1, n=1, x=1, y=7, z=12] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=2, counter=2, n=1, x=1, y=7, z=12] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=2, counter=2, n=1, x=1, y=7, z=12] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=2, counter=2, n=1, x=1, y=7, z=12] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=2, counter=2, n=1, x=1, y=7, z=12] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=2, counter=2, n=1, x=1, y=7, z=12] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=2, counter=2, n=2, x=8, y=19, z=18] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, counter=3, counter++=2, n=2, x=8, y=19, z=18] [L33] COND FALSE !(counter++<2) [L48] CALL __VERIFIER_assert(z == 6*n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L48] RET __VERIFIER_assert(z == 6*n + 6) VAL [\old(counter)=0, a=2, counter=3, n=2, x=8, y=19, z=18] [L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6265.2ms, OverallIterations: 11, TraceHistogramMax: 12, EmptinessCheckTime: 28.0ms, AutomataDifference: 1839.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 324 SDtfs, 117 SDslu, 913 SDs, 0 SdLazy, 1432 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1116.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 305 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 772.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=10, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 109.2ms AutomataMinimizationTime, 10 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 89.3ms SsaConstructionTime, 296.4ms SatisfiabilityAnalysisTime, 1589.6ms InterpolantComputationTime, 385 NumberOfCodeBlocks, 385 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 302 ConstructedInterpolants, 0 QuantifiedInterpolants, 1555 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1116 ConjunctsInSsa, 139 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 494/531 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...