/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/sqrt1-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:51:03,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:51:03,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:51:03,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:51:03,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:51:03,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:51:03,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:51:03,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:51:03,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:51:03,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:51:03,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:51:03,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:51:03,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:51:03,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:51:03,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:51:03,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:51:03,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:51:03,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:51:03,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:51:03,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:51:03,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:51:03,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:51:03,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:51:03,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:51:03,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:51:03,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:51:03,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:51:03,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:51:03,375 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:51:03,395 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:51:03,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:51:03,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:51:03,398 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:51:03,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:51:03,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:51:03,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:51:03,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:51:03,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:51:03,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:51:03,400 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:51:03,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:51:03,400 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:51:03,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:51:03,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:51:03,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:51:03,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:51:03,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:51:03,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:51:03,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:51:03,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:51:03,403 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:51:03,403 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:51:03,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:51:03,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:51:03,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:51:03,697 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:51:03,697 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:51:03,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2021-05-02 22:51:03,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ec813be3/dbb406fc19df47fb859fb353754e3407/FLAGdb5680526 [2021-05-02 22:51:04,220 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:51:04,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2021-05-02 22:51:04,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ec813be3/dbb406fc19df47fb859fb353754e3407/FLAGdb5680526 [2021-05-02 22:51:04,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ec813be3/dbb406fc19df47fb859fb353754e3407 [2021-05-02 22:51:04,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:51:04,627 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:51:04,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:51:04,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:51:04,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:51:04,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:51:04" (1/1) ... [2021-05-02 22:51:04,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447fa690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:04, skipping insertion in model container [2021-05-02 22:51:04,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:51:04" (1/1) ... [2021-05-02 22:51:04,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:51:04,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:51:04,764 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/sqrt1-ll_unwindbound50.c[520,533] [2021-05-02 22:51:04,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:51:04,788 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:51:04,836 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/sqrt1-ll_unwindbound50.c[520,533] [2021-05-02 22:51:04,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:51:04,867 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:51:04,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:04 WrapperNode [2021-05-02 22:51:04,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:51:04,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:51:04,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:51:04,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:51:04,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:04" (1/1) ... [2021-05-02 22:51:04,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:04" (1/1) ... [2021-05-02 22:51:04,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:04" (1/1) ... [2021-05-02 22:51:04,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:04" (1/1) ... [2021-05-02 22:51:04,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:04" (1/1) ... [2021-05-02 22:51:04,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:04" (1/1) ... [2021-05-02 22:51:04,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:04" (1/1) ... [2021-05-02 22:51:04,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:51:04,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:51:04,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:51:04,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:51:04,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:04" (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 22:51:04,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:51:04,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:51:04,998 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:51:04,998 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:51:04,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:51:04,999 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:51:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:51:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:51:04,999 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:51:05,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:51:05,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 22:51:05,000 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:51:05,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:51:05,000 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:51:05,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:51:05,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:51:05,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:51:05,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:51:05,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:51:05,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:51:05,288 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:51:05,289 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:51:05,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:05 BoogieIcfgContainer [2021-05-02 22:51:05,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:51:05,291 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:51:05,291 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:51:05,291 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:51:05,294 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:05" (1/1) ... [2021-05-02 22:51:05,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:51:05 BasicIcfg [2021-05-02 22:51:05,308 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:51:05,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:51:05,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:51:05,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:51:05,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:51:04" (1/4) ... [2021-05-02 22:51:05,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29370080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:51:05, skipping insertion in model container [2021-05-02 22:51:05,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:04" (2/4) ... [2021-05-02 22:51:05,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29370080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:51:05, skipping insertion in model container [2021-05-02 22:51:05,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:05" (3/4) ... [2021-05-02 22:51:05,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29370080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:51:05, skipping insertion in model container [2021-05-02 22:51:05,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:51:05" (4/4) ... [2021-05-02 22:51:05,314 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound50.cJordan [2021-05-02 22:51:05,319 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:51:05,322 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:51:05,336 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:51:05,352 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:51:05,352 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:51:05,353 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:51:05,353 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:51:05,353 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:51:05,353 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:51:05,353 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:51:05,353 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:51:05,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:51:05,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 22:51:05,387 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:05,387 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:05,388 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:05,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1238828824, now seen corresponding path program 1 times [2021-05-02 22:51:05,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:05,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499808904] [2021-05-02 22:51:05,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:05,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:51:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:05,691 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 22:51:05,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:05,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499808904] [2021-05-02 22:51:05,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499808904] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:51:05,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:51:05,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:51:05,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298917069] [2021-05-02 22:51:05,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:51:05,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:05,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:51:05,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:51:05,717 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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 22:51:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:05,864 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-05-02 22:51:05,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:51:05,867 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 22:51:05,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:05,873 INFO L225 Difference]: With dead ends: 27 [2021-05-02 22:51:05,873 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 22:51:05,875 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:51:05,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 22:51:05,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 22:51:05,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:51:05,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-02 22:51:05,903 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-02 22:51:05,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:05,903 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-02 22:51:05,904 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 22:51:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-02 22:51:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:51:05,904 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:05,905 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:05,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:51:05,905 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:05,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:05,906 INFO L82 PathProgramCache]: Analyzing trace with hash -221581531, now seen corresponding path program 1 times [2021-05-02 22:51:05,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:05,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208458499] [2021-05-02 22:51:05,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:05,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:51:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:05,991 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 22:51:05,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:05,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208458499] [2021-05-02 22:51:05,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208458499] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:51:05,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:51:05,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 22:51:05,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188837652] [2021-05-02 22:51:05,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:51:05,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:05,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:51:05,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:51:05,995 INFO L87 Difference]: Start difference. First operand 21 states and 27 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 22:51:06,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:06,137 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-05-02 22:51:06,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:51:06,138 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 22:51:06,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:06,139 INFO L225 Difference]: With dead ends: 23 [2021-05-02 22:51:06,139 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 22:51:06,139 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:06,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 22:51:06,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 22:51:06,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:51:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-02 22:51:06,144 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-02 22:51:06,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:06,144 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-02 22:51:06,144 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 22:51:06,144 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-02 22:51:06,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:51:06,145 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:06,145 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:06,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 22:51:06,145 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:06,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:06,146 INFO L82 PathProgramCache]: Analyzing trace with hash -220509055, now seen corresponding path program 1 times [2021-05-02 22:51:06,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:06,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995088368] [2021-05-02 22:51:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:06,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:51:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:06,258 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 22:51:06,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:06,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995088368] [2021-05-02 22:51:06,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995088368] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:51:06,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:51:06,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 22:51:06,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688644201] [2021-05-02 22:51:06,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:51:06,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:06,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:51:06,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:06,261 INFO L87 Difference]: Start difference. First operand 23 states and 29 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 22:51:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:06,522 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-05-02 22:51:06,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:06,524 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 22:51:06,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:06,526 INFO L225 Difference]: With dead ends: 34 [2021-05-02 22:51:06,526 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 22:51:06,527 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 22:51:06,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 22:51:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:51:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 22:51:06,547 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-02 22:51:06,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:06,548 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 22:51:06,548 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 22:51:06,549 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 22:51:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:51:06,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:06,550 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:06,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 22:51:06,550 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:06,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:06,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1748396925, now seen corresponding path program 1 times [2021-05-02 22:51:06,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:06,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208350354] [2021-05-02 22:51:06,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:06,580 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:06,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000145766] [2021-05-02 22:51:06,581 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 22:51:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 22:51:06,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:06,886 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 22:51:06,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:06,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208350354] [2021-05-02 22:51:06,887 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:06,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000145766] [2021-05-02 22:51:06,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000145766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:06,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:06,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:06,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98893206] [2021-05-02 22:51:06,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:06,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:06,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:06,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:06,889 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 22:51:07,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:07,014 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 22:51:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:07,015 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 22:51:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:07,016 INFO L225 Difference]: With dead ends: 38 [2021-05-02 22:51:07,017 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 22:51:07,018 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:07,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 22:51:07,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 22:51:07,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:51:07,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-05-02 22:51:07,030 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 17 [2021-05-02 22:51:07,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:07,031 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-05-02 22:51:07,031 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 22:51:07,031 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-05-02 22:51:07,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 22:51:07,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:07,033 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:07,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:07,256 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:07,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:07,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1697115236, now seen corresponding path program 1 times [2021-05-02 22:51:07,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:07,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151812671] [2021-05-02 22:51:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:07,268 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:07,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118833024] [2021-05-02 22:51:07,269 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 22:51:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:07,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 22:51:07,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:07,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:07,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:07,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:07,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:07,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:07,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:07,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:07,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:51:07,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:07,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151812671] [2021-05-02 22:51:07,480 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:07,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118833024] [2021-05-02 22:51:07,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118833024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:07,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:07,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 22:51:07,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568715301] [2021-05-02 22:51:07,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:51:07,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:07,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:51:07,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:51:07,482 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:51:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:07,514 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-02 22:51:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:51:07,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 22:51:07,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:07,516 INFO L225 Difference]: With dead ends: 37 [2021-05-02 22:51:07,516 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 22:51:07,516 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 22:51:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 22:51:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:51:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 22:51:07,521 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 30 [2021-05-02 22:51:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:07,521 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 22:51:07,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:51:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 22:51:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 22:51:07,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:07,522 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:07,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:07,733 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:07,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:07,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1698187712, now seen corresponding path program 1 times [2021-05-02 22:51:07,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:07,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284823646] [2021-05-02 22:51:07,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:07,744 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:07,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036292977] [2021-05-02 22:51:07,745 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 22:51:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:07,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 22:51:07,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:51:07,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:07,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284823646] [2021-05-02 22:51:07,979 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:07,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036292977] [2021-05-02 22:51:07,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036292977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:07,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:07,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:51:07,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464291369] [2021-05-02 22:51:07,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:51:07,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:07,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:51:07,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:07,982 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:51:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:08,048 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-05-02 22:51:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:51:08,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 22:51:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:08,050 INFO L225 Difference]: With dead ends: 48 [2021-05-02 22:51:08,050 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:51:08,051 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:08,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:51:08,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 22:51:08,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:51:08,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2021-05-02 22:51:08,061 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 30 [2021-05-02 22:51:08,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:08,061 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2021-05-02 22:51:08,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:51:08,061 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2021-05-02 22:51:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 22:51:08,062 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:08,062 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:08,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:08,281 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:08,282 INFO L82 PathProgramCache]: Analyzing trace with hash 888200606, now seen corresponding path program 2 times [2021-05-02 22:51:08,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:08,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365589030] [2021-05-02 22:51:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:08,308 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:08,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928781637] [2021-05-02 22:51:08,309 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 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 22:51:08,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:51:08,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:08,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 22:51:08,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:08,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:08,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:51:08,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:08,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365589030] [2021-05-02 22:51:08,509 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:08,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928781637] [2021-05-02 22:51:08,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928781637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:08,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:08,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:51:08,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522876302] [2021-05-02 22:51:08,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:51:08,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:08,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:51:08,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:51:08,511 INFO L87 Difference]: Start difference. First operand 46 states and 57 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:51:08,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:08,686 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-05-02 22:51:08,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:08,687 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-02 22:51:08,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:08,689 INFO L225 Difference]: With dead ends: 52 [2021-05-02 22:51:08,689 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 22:51:08,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:51:08,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 22:51:08,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 22:51:08,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:51:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-05-02 22:51:08,697 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-05-02 22:51:08,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:08,697 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-05-02 22:51:08,697 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:51:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-05-02 22:51:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 22:51:08,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:08,699 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:08,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:08,913 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:08,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:08,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2014164963, now seen corresponding path program 2 times [2021-05-02 22:51:08,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:08,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520000119] [2021-05-02 22:51:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:08,920 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:08,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47821248] [2021-05-02 22:51:08,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:08,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:51:08,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:08,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 22:51:08,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:09,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:09,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:09,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:09,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:09,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:09,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:09,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:09,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:09,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:09,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:09,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 22:51:09,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:09,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520000119] [2021-05-02 22:51:09,120 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:09,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47821248] [2021-05-02 22:51:09,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47821248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:09,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:09,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:51:09,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388576048] [2021-05-02 22:51:09,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:51:09,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:09,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:51:09,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:09,122 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 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 22:51:09,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:09,172 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-05-02 22:51:09,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:09,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 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 48 [2021-05-02 22:51:09,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:09,175 INFO L225 Difference]: With dead ends: 51 [2021-05-02 22:51:09,175 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 22:51:09,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:09,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 22:51:09,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-02 22:51:09,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:51:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-05-02 22:51:09,190 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 48 [2021-05-02 22:51:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:09,190 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-05-02 22:51:09,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 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 22:51:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-05-02 22:51:09,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 22:51:09,197 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:09,197 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:09,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:09,413 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:09,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:09,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2015237439, now seen corresponding path program 3 times [2021-05-02 22:51:09,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:09,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065732229] [2021-05-02 22:51:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:09,425 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:09,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221795317] [2021-05-02 22:51:09,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:09,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 22:51:09,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:09,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 22:51:09,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 22:51:09,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:09,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065732229] [2021-05-02 22:51:09,603 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:09,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221795317] [2021-05-02 22:51:09,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221795317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:09,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:09,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:51:09,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587541504] [2021-05-02 22:51:09,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:51:09,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:09,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:51:09,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:09,605 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:51:09,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:09,673 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-02 22:51:09,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:09,674 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2021-05-02 22:51:09,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:09,675 INFO L225 Difference]: With dead ends: 62 [2021-05-02 22:51:09,675 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 22:51:09,675 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:09,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 22:51:09,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-05-02 22:51:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:51:09,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-05-02 22:51:09,679 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 48 [2021-05-02 22:51:09,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:09,680 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-05-02 22:51:09,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:51:09,680 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-05-02 22:51:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 22:51:09,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:09,681 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:09,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:09,893 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:09,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:09,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1772710271, now seen corresponding path program 4 times [2021-05-02 22:51:09,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:09,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007273004] [2021-05-02 22:51:09,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:09,914 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:09,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578858781] [2021-05-02 22:51:09,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:09,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:51:09,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:09,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 22:51:09,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:10,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:10,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 22:51:10,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:10,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007273004] [2021-05-02 22:51:10,111 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:10,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578858781] [2021-05-02 22:51:10,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578858781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:10,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:10,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:51:10,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191756739] [2021-05-02 22:51:10,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:51:10,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:10,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:51:10,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:51:10,115 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 22:51:10,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:10,218 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-05-02 22:51:10,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 22:51:10,219 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2021-05-02 22:51:10,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:10,219 INFO L225 Difference]: With dead ends: 58 [2021-05-02 22:51:10,219 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 22:51:10,219 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 22:51:10,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 22:51:10,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 22:51:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 22:51:10,220 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2021-05-02 22:51:10,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:10,220 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 22:51:10,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 22:51:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 22:51:10,221 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 22:51:10,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:51:10,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:51:10 BasicIcfg [2021-05-02 22:51:10,440 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:51:10,441 INFO L168 Benchmark]: Toolchain (without parser) took 5813.73 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 145.2 MB in the beginning and 197.2 MB in the end (delta: -52.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:51:10,441 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 180.4 MB. Free memory is still 162.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:51:10,441 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.58 ms. Allocated memory is still 180.4 MB. Free memory was 145.0 MB in the beginning and 163.9 MB in the end (delta: -18.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:10,441 INFO L168 Benchmark]: Boogie Preprocessor took 47.33 ms. Allocated memory is still 180.4 MB. Free memory was 163.9 MB in the beginning and 162.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:10,441 INFO L168 Benchmark]: RCFGBuilder took 368.67 ms. Allocated memory is still 180.4 MB. Free memory was 162.4 MB in the beginning and 147.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:10,441 INFO L168 Benchmark]: IcfgTransformer took 17.43 ms. Allocated memory is still 180.4 MB. Free memory was 147.9 MB in the beginning and 146.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:10,442 INFO L168 Benchmark]: TraceAbstraction took 5131.11 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 146.1 MB in the beginning and 197.2 MB in the end (delta: -51.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:51:10,442 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 180.4 MB. Free memory is still 162.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 242.58 ms. Allocated memory is still 180.4 MB. Free memory was 145.0 MB in the beginning and 163.9 MB in the end (delta: -18.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.33 ms. Allocated memory is still 180.4 MB. Free memory was 163.9 MB in the beginning and 162.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 368.67 ms. Allocated memory is still 180.4 MB. Free memory was 162.4 MB in the beginning and 147.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 17.43 ms. Allocated memory is still 180.4 MB. Free memory was 147.9 MB in the beginning and 146.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5131.11 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 146.1 MB in the beginning and 197.2 MB in the end (delta: -51.1 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5087.2ms, OverallIterations: 10, TraceHistogramMax: 8, EmptinessCheckTime: 23.3ms, AutomataDifference: 1231.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 272 SDtfs, 88 SDslu, 752 SDs, 0 SdLazy, 560 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 648.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 287 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 580.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=9, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 91.6ms AutomataMinimizationTime, 10 MinimizatonAttempts, 7 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 96.7ms SsaConstructionTime, 234.8ms SatisfiabilityAnalysisTime, 1417.2ms InterpolantComputationTime, 296 NumberOfCodeBlocks, 276 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 286 ConstructedInterpolants, 0 QuantifiedInterpolants, 1017 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1042 ConjunctsInSsa, 120 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 253/357 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...