/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/egcd-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:19:29,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:19:29,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:19:29,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:19:29,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:19:29,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:19:29,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:19:29,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:19:29,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:19:29,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:19:29,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:19:29,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:19:29,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:19:29,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:19:29,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:19:29,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:19:29,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:19:29,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:19:29,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:19:29,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:19:29,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:19:29,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:19:29,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:19:29,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:19:29,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:19:29,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:19:29,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:19:29,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:19:29,349 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:19:29,363 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:19:29,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:19:29,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:19:29,364 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:19:29,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:19:29,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:19:29,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:19:29,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:19:29,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:19:29,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:19:29,365 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:19:29,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:19:29,366 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:19:29,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:19:29,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:19:29,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:19:29,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:19:29,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:19:29,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:19:29,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:19:29,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:19:29,367 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:19:29,367 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:19:29,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:19:29,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:19:29,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:19:29,696 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:19:29,697 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:19:29,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound50.c [2021-05-02 20:19:29,764 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f42b20bb0/dab974f22f3d4af389d09e8ba8efcc23/FLAGdc37170c2 [2021-05-02 20:19:30,223 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:19:30,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound50.c [2021-05-02 20:19:30,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f42b20bb0/dab974f22f3d4af389d09e8ba8efcc23/FLAGdc37170c2 [2021-05-02 20:19:30,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f42b20bb0/dab974f22f3d4af389d09e8ba8efcc23 [2021-05-02 20:19:30,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:19:30,257 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:19:30,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:19:30,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:19:30,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:19:30,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:19:30" (1/1) ... [2021-05-02 20:19:30,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e530b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:30, skipping insertion in model container [2021-05-02 20:19:30,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:19:30" (1/1) ... [2021-05-02 20:19:30,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:19:30,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:19:30,389 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/egcd-ll_valuebound50.c[489,502] [2021-05-02 20:19:30,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:19:30,410 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:19:30,424 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/egcd-ll_valuebound50.c[489,502] [2021-05-02 20:19:30,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:19:30,459 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:19:30,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:30 WrapperNode [2021-05-02 20:19:30,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:19:30,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:19:30,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:19:30,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:19:30,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:30" (1/1) ... [2021-05-02 20:19:30,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:30" (1/1) ... [2021-05-02 20:19:30,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:30" (1/1) ... [2021-05-02 20:19:30,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:30" (1/1) ... [2021-05-02 20:19:30,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:30" (1/1) ... [2021-05-02 20:19:30,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:30" (1/1) ... [2021-05-02 20:19:30,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:30" (1/1) ... [2021-05-02 20:19:30,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:19:30,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:19:30,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:19:30,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:19:30,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:19:30,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:19:30,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:19:30,538 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:19:30,538 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:19:30,538 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:19:30,538 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:19:30,538 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:19:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:19:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:19:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:19:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:19:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:19:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:19:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:19:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:19:30,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:19:30,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:19:30,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:19:30,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:19:30,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:19:30,785 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:19:30,786 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:19:30,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:19:30 BoogieIcfgContainer [2021-05-02 20:19:30,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:19:30,787 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:19:30,788 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:19:30,812 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:19:30,815 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:19:30" (1/1) ... [2021-05-02 20:19:30,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:19:30 BasicIcfg [2021-05-02 20:19:30,831 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:19:30,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:19:30,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:19:30,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:19:30,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:19:30" (1/4) ... [2021-05-02 20:19:30,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eae3e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:19:30, skipping insertion in model container [2021-05-02 20:19:30,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:19:30" (2/4) ... [2021-05-02 20:19:30,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eae3e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:19:30, skipping insertion in model container [2021-05-02 20:19:30,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:19:30" (3/4) ... [2021-05-02 20:19:30,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eae3e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:19:30, skipping insertion in model container [2021-05-02 20:19:30,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:19:30" (4/4) ... [2021-05-02 20:19:30,860 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound50.cJordan [2021-05-02 20:19:30,864 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:19:30,867 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:19:30,883 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:19:30,906 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:19:30,906 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:19:30,906 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:19:30,906 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:19:30,906 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:19:30,906 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:19:30,906 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:19:30,906 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:19:30,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:19:30,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:19:30,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:30,930 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:30,930 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:30,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:30,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1381881312, now seen corresponding path program 1 times [2021-05-02 20:19:30,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:30,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472878376] [2021-05-02 20:19:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:31,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:19:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:31,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:19:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:31,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:19:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:31,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:19:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:31,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:19:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:19:31,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:31,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472878376] [2021-05-02 20:19:31,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472878376] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:19:31,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:19:31,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:19:31,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113897323] [2021-05-02 20:19:31,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:19:31,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:31,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:19:31,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:19:31,261 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:19:31,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:31,403 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-02 20:19:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:19:31,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:19:31,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:31,411 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:19:31,411 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:19:31,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:19:31,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:19:31,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:19:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:19:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 20:19:31,439 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-02 20:19:31,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:31,440 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 20:19:31,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:19:31,440 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 20:19:31,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:19:31,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:31,442 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:31,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:19:31,442 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:31,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:31,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1975235811, now seen corresponding path program 1 times [2021-05-02 20:19:31,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:31,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716847354] [2021-05-02 20:19:31,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:31,461 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:31,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506591479] [2021-05-02 20:19:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:31,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:19:31,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:31,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:19:31,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:31,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716847354] [2021-05-02 20:19:31,648 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:31,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506591479] [2021-05-02 20:19:31,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506591479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:31,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:31,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:19:31,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110182359] [2021-05-02 20:19:31,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:19:31,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:31,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:19:31,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:19:31,651 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:19:31,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:31,727 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-05-02 20:19:31,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:19:31,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-02 20:19:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:31,729 INFO L225 Difference]: With dead ends: 46 [2021-05-02 20:19:31,729 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:19:31,730 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:19:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:19:31,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 20:19:31,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:19:31,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-02 20:19:31,739 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-02 20:19:31,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:31,739 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-02 20:19:31,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:19:31,739 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-02 20:19:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:19:31,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:31,740 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:31,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:19:31,957 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:31,958 INFO L82 PathProgramCache]: Analyzing trace with hash -759782395, now seen corresponding path program 1 times [2021-05-02 20:19:31,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:31,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404557471] [2021-05-02 20:19:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:31,973 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:31,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006846277] [2021-05-02 20:19:31,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:32,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:19:32,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:32,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:19:32,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:32,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404557471] [2021-05-02 20:19:32,224 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:32,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006846277] [2021-05-02 20:19:32,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006846277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:32,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:32,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:19:32,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533120466] [2021-05-02 20:19:32,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:19:32,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:32,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:19:32,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:19:32,226 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:19:32,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:32,335 INFO L93 Difference]: Finished difference Result 68 states and 100 transitions. [2021-05-02 20:19:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:19:32,335 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-05-02 20:19:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:32,338 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:19:32,338 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:19:32,339 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:32,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:19:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-02 20:19:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 20:19:32,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-02 20:19:32,348 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-02 20:19:32,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:32,348 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-02 20:19:32,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:19:32,349 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-02 20:19:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:19:32,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:32,350 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:32,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:32,572 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:32,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:32,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1840397536, now seen corresponding path program 1 times [2021-05-02 20:19:32,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:32,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006100451] [2021-05-02 20:19:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:32,589 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:32,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554670077] [2021-05-02 20:19:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:32,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:19:32,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:32,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:19:32,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:32,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006100451] [2021-05-02 20:19:32,823 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:32,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554670077] [2021-05-02 20:19:32,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554670077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:32,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:32,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:19:32,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754311967] [2021-05-02 20:19:32,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:19:32,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:32,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:19:32,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:19:32,827 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:19:32,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:32,958 INFO L93 Difference]: Finished difference Result 66 states and 91 transitions. [2021-05-02 20:19:32,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:19:32,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 43 [2021-05-02 20:19:32,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:32,964 INFO L225 Difference]: With dead ends: 66 [2021-05-02 20:19:32,965 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 20:19:32,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:19:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 20:19:32,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 20:19:32,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:19:32,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-02 20:19:32,986 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-02 20:19:32,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:32,986 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-02 20:19:32,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:19:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-02 20:19:32,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 20:19:32,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:32,988 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:33,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:33,212 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:33,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:33,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1590647429, now seen corresponding path program 1 times [2021-05-02 20:19:33,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:33,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968238926] [2021-05-02 20:19:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:33,229 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:33,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377174402] [2021-05-02 20:19:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:33,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:19:33,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:19:33,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:33,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968238926] [2021-05-02 20:19:33,393 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:33,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377174402] [2021-05-02 20:19:33,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377174402] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:19:33,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:19:33,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:19:33,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221619807] [2021-05-02 20:19:33,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:19:33,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:33,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:19:33,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:19:33,395 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 20:19:33,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:33,433 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2021-05-02 20:19:33,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:19:33,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-02 20:19:33,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:33,434 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:19:33,435 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:19:33,435 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:19:33,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:19:33,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 20:19:33,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:19:33,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-02 20:19:33,441 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-02 20:19:33,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:33,441 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-02 20:19:33,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 20:19:33,442 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-02 20:19:33,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 20:19:33,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:33,443 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:33,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:33,649 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:33,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:33,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1766531305, now seen corresponding path program 1 times [2021-05-02 20:19:33,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:33,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645521344] [2021-05-02 20:19:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:33,661 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:33,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306185057] [2021-05-02 20:19:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:33,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:19:33,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:33,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 20:19:33,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:33,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645521344] [2021-05-02 20:19:33,876 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:33,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306185057] [2021-05-02 20:19:33,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306185057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:33,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:33,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:19:33,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877720780] [2021-05-02 20:19:33,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:19:33,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:33,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:19:33,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:19:33,878 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:19:33,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:33,965 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-05-02 20:19:33,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:19:33,965 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-02 20:19:33,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:33,966 INFO L225 Difference]: With dead ends: 82 [2021-05-02 20:19:33,966 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 20:19:33,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:19:33,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 20:19:33,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-02 20:19:33,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:19:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 20:19:33,973 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-02 20:19:33,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:33,973 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 20:19:33,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:19:33,973 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 20:19:33,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:19:33,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:33,975 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:34,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:19:34,189 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:34,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:34,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1046589490, now seen corresponding path program 1 times [2021-05-02 20:19:34,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:34,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819116020] [2021-05-02 20:19:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:34,215 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:34,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398145192] [2021-05-02 20:19:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:34,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:19:34,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:34,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:19:34,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:34,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819116020] [2021-05-02 20:19:34,474 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:34,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398145192] [2021-05-02 20:19:34,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398145192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:34,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:34,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:19:34,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878814431] [2021-05-02 20:19:34,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:19:34,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:34,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:19:34,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:19:34,475 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:19:34,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:34,604 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2021-05-02 20:19:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:19:34,605 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-02 20:19:34,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:34,606 INFO L225 Difference]: With dead ends: 86 [2021-05-02 20:19:34,606 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 20:19:34,606 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:19:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 20:19:34,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 20:19:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:19:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-02 20:19:34,616 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-02 20:19:34,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:34,616 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-02 20:19:34,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:19:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-02 20:19:34,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 20:19:34,617 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:34,618 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:34,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:34,822 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:34,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:34,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2126309122, now seen corresponding path program 1 times [2021-05-02 20:19:34,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:34,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478652523] [2021-05-02 20:19:34,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:34,829 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:34,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227601981] [2021-05-02 20:19:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:34,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:19:34,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:34,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:34,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 20:19:35,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:35,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478652523] [2021-05-02 20:19:35,204 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:35,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227601981] [2021-05-02 20:19:35,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227601981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:35,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:35,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:35,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450081874] [2021-05-02 20:19:35,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:35,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:35,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:35,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:35,205 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:19:35,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:35,441 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-05-02 20:19:35,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:19:35,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2021-05-02 20:19:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:35,443 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:19:35,443 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:19:35,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:19:35,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:19:35,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-05-02 20:19:35,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 20:19:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-05-02 20:19:35,451 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2021-05-02 20:19:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:35,452 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-05-02 20:19:35,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:19:35,452 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-05-02 20:19:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:19:35,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:35,453 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:35,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:35,676 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:35,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:35,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1746772058, now seen corresponding path program 2 times [2021-05-02 20:19:35,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:35,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688267881] [2021-05-02 20:19:35,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:35,684 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:35,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349562513] [2021-05-02 20:19:35,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:35,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:19:35,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:35,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 20:19:35,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:35,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:19:35,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:35,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688267881] [2021-05-02 20:19:35,993 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:35,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349562513] [2021-05-02 20:19:35,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349562513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:35,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:35,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:19:35,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795877369] [2021-05-02 20:19:35,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:19:35,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:35,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:19:35,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:19:35,995 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:19:36,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:36,177 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-05-02 20:19:36,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:19:36,178 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 61 [2021-05-02 20:19:36,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:36,181 INFO L225 Difference]: With dead ends: 135 [2021-05-02 20:19:36,181 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 20:19:36,181 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:36,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 20:19:36,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-02 20:19:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 20:19:36,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-05-02 20:19:36,192 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2021-05-02 20:19:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:36,192 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-05-02 20:19:36,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:19:36,193 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-05-02 20:19:36,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:19:36,194 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:36,194 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:36,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:19:36,417 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:36,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:36,418 INFO L82 PathProgramCache]: Analyzing trace with hash -296466288, now seen corresponding path program 1 times [2021-05-02 20:19:36,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:36,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125716221] [2021-05-02 20:19:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:36,426 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:36,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410483192] [2021-05-02 20:19:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:36,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:19:36,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:36,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:36,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:36,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:36,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:36,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:36,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:36,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:36,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:36,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:36,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:36,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:36,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:36,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 20:19:36,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:36,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125716221] [2021-05-02 20:19:36,710 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:36,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410483192] [2021-05-02 20:19:36,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410483192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:36,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:36,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:19:36,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131547290] [2021-05-02 20:19:36,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:19:36,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:36,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:19:36,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:19:36,711 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:19:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:36,943 INFO L93 Difference]: Finished difference Result 149 states and 191 transitions. [2021-05-02 20:19:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:19:36,944 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 20:19:36,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:36,948 INFO L225 Difference]: With dead ends: 149 [2021-05-02 20:19:36,948 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 20:19:36,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:19:36,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 20:19:36,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-02 20:19:36,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 86 states have internal predecessors, (95), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 20:19:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2021-05-02 20:19:36,974 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 69 [2021-05-02 20:19:36,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:36,975 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2021-05-02 20:19:36,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:19:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2021-05-02 20:19:36,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:19:36,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:36,979 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:37,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:37,180 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:37,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:37,181 INFO L82 PathProgramCache]: Analyzing trace with hash -392102192, now seen corresponding path program 2 times [2021-05-02 20:19:37,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:37,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872098203] [2021-05-02 20:19:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:37,192 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:37,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265111882] [2021-05-02 20:19:37,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:37,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:19:37,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:37,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:19:37,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:37,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:37,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:37,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:37,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:37,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:37,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:37,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:37,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:37,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:37,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:37,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:37,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:37,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 20:19:37,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:37,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872098203] [2021-05-02 20:19:37,480 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:37,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265111882] [2021-05-02 20:19:37,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265111882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:37,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:37,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:19:37,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110485946] [2021-05-02 20:19:37,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:19:37,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:37,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:19:37,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:19:37,482 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:19:37,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:37,702 INFO L93 Difference]: Finished difference Result 164 states and 210 transitions. [2021-05-02 20:19:37,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:19:37,702 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 20:19:37,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:37,704 INFO L225 Difference]: With dead ends: 164 [2021-05-02 20:19:37,704 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 20:19:37,705 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:19:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 20:19:37,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-02 20:19:37,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 94 states have internal predecessors, (103), 51 states have call successors, (51), 20 states have call predecessors, (51), 19 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 20:19:37,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-05-02 20:19:37,717 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 69 [2021-05-02 20:19:37,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:37,719 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-05-02 20:19:37,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:19:37,720 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-05-02 20:19:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:19:37,722 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:37,722 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:37,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:37,945 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:37,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:37,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1674813879, now seen corresponding path program 2 times [2021-05-02 20:19:37,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:37,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921163058] [2021-05-02 20:19:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:37,968 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:37,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677075408] [2021-05-02 20:19:37,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:38,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:19:38,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:38,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:19:38,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:38,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:19:38,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:38,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921163058] [2021-05-02 20:19:38,344 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:38,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677075408] [2021-05-02 20:19:38,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677075408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:38,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:38,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:19:38,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912065442] [2021-05-02 20:19:38,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:19:38,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:38,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:19:38,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:19:38,347 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:19:38,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:38,583 INFO L93 Difference]: Finished difference Result 188 states and 239 transitions. [2021-05-02 20:19:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:19:38,583 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-02 20:19:38,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:38,585 INFO L225 Difference]: With dead ends: 188 [2021-05-02 20:19:38,585 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 20:19:38,585 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:19:38,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 20:19:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-05-02 20:19:38,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 109 states have internal predecessors, (121), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 20:19:38,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-02 20:19:38,593 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 74 [2021-05-02 20:19:38,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:38,593 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-02 20:19:38,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:19:38,594 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-02 20:19:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:19:38,594 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:38,594 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:38,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:19:38,820 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:38,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1927051720, now seen corresponding path program 3 times [2021-05-02 20:19:38,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:38,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456285280] [2021-05-02 20:19:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:38,828 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:38,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258464463] [2021-05-02 20:19:38,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:38,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:19:38,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:38,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:19:38,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:38,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:38,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-05-02 20:19:39,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:39,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456285280] [2021-05-02 20:19:39,303 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:39,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258464463] [2021-05-02 20:19:39,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258464463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:39,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:39,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:19:39,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882129106] [2021-05-02 20:19:39,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:19:39,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:39,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:19:39,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:19:39,304 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:19:39,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:39,544 INFO L93 Difference]: Finished difference Result 211 states and 264 transitions. [2021-05-02 20:19:39,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:19:39,545 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-02 20:19:39,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:39,547 INFO L225 Difference]: With dead ends: 211 [2021-05-02 20:19:39,547 INFO L226 Difference]: Without dead ends: 211 [2021-05-02 20:19:39,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-02 20:19:39,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2021-05-02 20:19:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 119 states have internal predecessors, (132), 57 states have call successors, (57), 26 states have call predecessors, (57), 25 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 20:19:39,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-05-02 20:19:39,554 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 74 [2021-05-02 20:19:39,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:39,555 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-05-02 20:19:39,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:19:39,555 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-05-02 20:19:39,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:19:39,556 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:39,556 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:39,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:19:39,773 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:39,773 INFO L82 PathProgramCache]: Analyzing trace with hash 504849037, now seen corresponding path program 4 times [2021-05-02 20:19:39,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:39,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502911071] [2021-05-02 20:19:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:39,781 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:39,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886878117] [2021-05-02 20:19:39,781 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:39,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:19:39,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:39,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:19:39,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:39,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:39,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-02 20:19:40,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:40,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502911071] [2021-05-02 20:19:40,153 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:40,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886878117] [2021-05-02 20:19:40,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886878117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:40,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:40,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:19:40,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938607647] [2021-05-02 20:19:40,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:19:40,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:40,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:19:40,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:19:40,154 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:19:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:40,518 INFO L93 Difference]: Finished difference Result 217 states and 270 transitions. [2021-05-02 20:19:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:19:40,519 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-02 20:19:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:40,520 INFO L225 Difference]: With dead ends: 217 [2021-05-02 20:19:40,520 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 20:19:40,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:19:40,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 20:19:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2021-05-02 20:19:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 103 states have (on average 1.145631067961165) internal successors, (118), 107 states have internal predecessors, (118), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 20:19:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-05-02 20:19:40,527 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 79 [2021-05-02 20:19:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:40,527 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-05-02 20:19:40,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:19:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-05-02 20:19:40,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:19:40,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:40,528 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:40,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:19:40,753 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:40,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:40,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1530341036, now seen corresponding path program 3 times [2021-05-02 20:19:40,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:40,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131900314] [2021-05-02 20:19:40,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:40,760 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:40,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234839219] [2021-05-02 20:19:40,760 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:40,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:19:40,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:40,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:19:40,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:40,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:40,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:41,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:41,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:41,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:41,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:41,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:41,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-02 20:19:41,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:41,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131900314] [2021-05-02 20:19:41,114 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:41,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234839219] [2021-05-02 20:19:41,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234839219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:41,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:41,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:19:41,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174880026] [2021-05-02 20:19:41,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:19:41,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:41,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:19:41,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:19:41,117 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:19:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:41,467 INFO L93 Difference]: Finished difference Result 207 states and 256 transitions. [2021-05-02 20:19:41,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:19:41,468 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-02 20:19:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:41,469 INFO L225 Difference]: With dead ends: 207 [2021-05-02 20:19:41,469 INFO L226 Difference]: Without dead ends: 202 [2021-05-02 20:19:41,471 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:19:41,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-02 20:19:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2021-05-02 20:19:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 118 states have (on average 1.152542372881356) internal successors, (136), 122 states have internal predecessors, (136), 54 states have call successors, (54), 27 states have call predecessors, (54), 26 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 20:19:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 241 transitions. [2021-05-02 20:19:41,478 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 241 transitions. Word has length 79 [2021-05-02 20:19:41,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:41,479 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 241 transitions. [2021-05-02 20:19:41,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:19:41,479 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 241 transitions. [2021-05-02 20:19:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:19:41,480 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:41,480 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:41,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:41,701 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:41,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:41,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1037601673, now seen corresponding path program 5 times [2021-05-02 20:19:41,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:41,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110508631] [2021-05-02 20:19:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:41,712 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:41,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241287229] [2021-05-02 20:19:41,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:41,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 20:19:41,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:41,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 20:19:41,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:41,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 20:19:41,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:41,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110508631] [2021-05-02 20:19:41,957 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:41,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241287229] [2021-05-02 20:19:41,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241287229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:41,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:41,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:19:41,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68522311] [2021-05-02 20:19:41,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:19:41,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:41,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:19:41,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:19:41,959 INFO L87 Difference]: Start difference. First operand 199 states and 241 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:19:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:42,115 INFO L93 Difference]: Finished difference Result 229 states and 286 transitions. [2021-05-02 20:19:42,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:19:42,116 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-05-02 20:19:42,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:42,117 INFO L225 Difference]: With dead ends: 229 [2021-05-02 20:19:42,117 INFO L226 Difference]: Without dead ends: 229 [2021-05-02 20:19:42,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:19:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-02 20:19:42,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 216. [2021-05-02 20:19:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 125 states have (on average 1.16) internal successors, (145), 130 states have internal predecessors, (145), 63 states have call successors, (63), 28 states have call predecessors, (63), 27 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:19:42,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 268 transitions. [2021-05-02 20:19:42,125 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 268 transitions. Word has length 87 [2021-05-02 20:19:42,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:42,125 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 268 transitions. [2021-05-02 20:19:42,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:19:42,125 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 268 transitions. [2021-05-02 20:19:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:19:42,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:42,126 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:42,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:19:42,341 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:42,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1133237577, now seen corresponding path program 6 times [2021-05-02 20:19:42,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:42,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156316341] [2021-05-02 20:19:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:42,348 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:42,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157869038] [2021-05-02 20:19:42,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:42,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-02 20:19:42,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:42,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:19:42,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:42,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:42,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:42,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:42,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:42,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:42,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:42,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:42,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:42,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:42,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:42,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 20:19:42,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:42,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156316341] [2021-05-02 20:19:42,635 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:42,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157869038] [2021-05-02 20:19:42,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157869038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:42,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:42,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:19:42,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313975304] [2021-05-02 20:19:42,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:19:42,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:42,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:19:42,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:19:42,636 INFO L87 Difference]: Start difference. First operand 216 states and 268 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:19:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:42,888 INFO L93 Difference]: Finished difference Result 239 states and 300 transitions. [2021-05-02 20:19:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:19:42,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-02 20:19:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:42,890 INFO L225 Difference]: With dead ends: 239 [2021-05-02 20:19:42,890 INFO L226 Difference]: Without dead ends: 236 [2021-05-02 20:19:42,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:19:42,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-02 20:19:42,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-05-02 20:19:42,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 136 states have (on average 1.1544117647058822) internal successors, (157), 141 states have internal predecessors, (157), 69 states have call successors, (69), 30 states have call predecessors, (69), 29 states have return successors, (66), 63 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 20:19:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 292 transitions. [2021-05-02 20:19:42,897 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 292 transitions. Word has length 87 [2021-05-02 20:19:42,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:42,897 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 292 transitions. [2021-05-02 20:19:42,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:19:42,897 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 292 transitions. [2021-05-02 20:19:42,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:19:42,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:42,898 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:43,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:19:43,113 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:43,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1104608426, now seen corresponding path program 7 times [2021-05-02 20:19:43,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:43,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106451558] [2021-05-02 20:19:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:43,120 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:43,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987041055] [2021-05-02 20:19:43,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:43,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:19:43,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:43,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 20:19:43,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:43,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106451558] [2021-05-02 20:19:43,476 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:43,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987041055] [2021-05-02 20:19:43,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987041055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:43,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:43,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:43,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523111086] [2021-05-02 20:19:43,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:43,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:43,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:43,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:43,479 INFO L87 Difference]: Start difference. First operand 235 states and 292 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:19:43,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:43,778 INFO L93 Difference]: Finished difference Result 249 states and 313 transitions. [2021-05-02 20:19:43,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:19:43,779 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2021-05-02 20:19:43,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:43,781 INFO L225 Difference]: With dead ends: 249 [2021-05-02 20:19:43,781 INFO L226 Difference]: Without dead ends: 249 [2021-05-02 20:19:43,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:19:43,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-02 20:19:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 247. [2021-05-02 20:19:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 147 states have internal predecessors, (163), 75 states have call successors, (75), 31 states have call predecessors, (75), 30 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:19:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 310 transitions. [2021-05-02 20:19:43,790 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 310 transitions. Word has length 87 [2021-05-02 20:19:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:43,791 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 310 transitions. [2021-05-02 20:19:43,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:19:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 310 transitions. [2021-05-02 20:19:43,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:19:43,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:43,792 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:44,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:19:44,015 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:44,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:44,015 INFO L82 PathProgramCache]: Analyzing trace with hash -942157577, now seen corresponding path program 8 times [2021-05-02 20:19:44,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:44,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274703907] [2021-05-02 20:19:44,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:44,022 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:44,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701423079] [2021-05-02 20:19:44,022 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:44,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:19:44,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:44,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:19:44,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:44,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 20:19:44,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:44,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274703907] [2021-05-02 20:19:44,319 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:44,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701423079] [2021-05-02 20:19:44,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701423079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:44,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:44,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:44,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578574949] [2021-05-02 20:19:44,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:44,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:44,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:44,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:44,321 INFO L87 Difference]: Start difference. First operand 247 states and 310 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:19:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:44,604 INFO L93 Difference]: Finished difference Result 260 states and 329 transitions. [2021-05-02 20:19:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:19:44,605 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-02 20:19:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:44,606 INFO L225 Difference]: With dead ends: 260 [2021-05-02 20:19:44,606 INFO L226 Difference]: Without dead ends: 257 [2021-05-02 20:19:44,607 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:19:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-02 20:19:44,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 247. [2021-05-02 20:19:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 147 states have internal predecessors, (163), 75 states have call successors, (75), 31 states have call predecessors, (75), 30 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:19:44,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 310 transitions. [2021-05-02 20:19:44,614 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 310 transitions. Word has length 87 [2021-05-02 20:19:44,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:44,614 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 310 transitions. [2021-05-02 20:19:44,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:19:44,615 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 310 transitions. [2021-05-02 20:19:44,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:19:44,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:44,616 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:44,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:44,829 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:44,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:44,829 INFO L82 PathProgramCache]: Analyzing trace with hash -913528426, now seen corresponding path program 9 times [2021-05-02 20:19:44,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:44,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405034822] [2021-05-02 20:19:44,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:44,835 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:44,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189864020] [2021-05-02 20:19:44,835 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:44,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:19:44,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:44,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:19:44,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:44,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:44,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:45,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:45,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:45,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:45,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:45,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:45,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:45,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:45,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:45,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:45,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:45,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:45,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:45,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:45,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:45,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-02 20:19:45,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:45,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405034822] [2021-05-02 20:19:45,114 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:45,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189864020] [2021-05-02 20:19:45,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189864020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:45,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:45,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:45,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815536037] [2021-05-02 20:19:45,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:45,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:45,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:45,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:45,116 INFO L87 Difference]: Start difference. First operand 247 states and 310 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:19:52,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:52,028 INFO L93 Difference]: Finished difference Result 251 states and 313 transitions. [2021-05-02 20:19:52,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:19:52,028 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-02 20:19:52,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:52,029 INFO L225 Difference]: With dead ends: 251 [2021-05-02 20:19:52,029 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 20:19:52,030 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:19:52,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 20:19:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 228. [2021-05-02 20:19:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 141 states have internal predecessors, (154), 61 states have call successors, (61), 31 states have call predecessors, (61), 30 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 20:19:52,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 274 transitions. [2021-05-02 20:19:52,036 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 274 transitions. Word has length 87 [2021-05-02 20:19:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:52,036 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 274 transitions. [2021-05-02 20:19:52,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:19:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 274 transitions. [2021-05-02 20:19:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:19:52,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:52,037 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:52,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:52,257 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:52,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1009164330, now seen corresponding path program 10 times [2021-05-02 20:19:52,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:52,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397339202] [2021-05-02 20:19:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:52,262 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:52,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135462068] [2021-05-02 20:19:52,263 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:52,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:19:52,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:52,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:19:52,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:52,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:52,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:52,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:52,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:52,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:52,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:52,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:52,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:52,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:52,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:52,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:52,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:52,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:52,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:52,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:52,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 20:19:52,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:52,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397339202] [2021-05-02 20:19:52,615 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:52,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135462068] [2021-05-02 20:19:52,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135462068] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:52,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:52,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:52,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305589645] [2021-05-02 20:19:52,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:52,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:52,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:52,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:52,617 INFO L87 Difference]: Start difference. First operand 228 states and 274 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:19:52,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:52,928 INFO L93 Difference]: Finished difference Result 238 states and 287 transitions. [2021-05-02 20:19:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:19:52,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2021-05-02 20:19:52,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:52,930 INFO L225 Difference]: With dead ends: 238 [2021-05-02 20:19:52,930 INFO L226 Difference]: Without dead ends: 238 [2021-05-02 20:19:52,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:19:52,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-02 20:19:52,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2021-05-02 20:19:52,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 146 states have internal predecessors, (158), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:19:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2021-05-02 20:19:52,937 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 87 [2021-05-02 20:19:52,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:52,937 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2021-05-02 20:19:52,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:19:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2021-05-02 20:19:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:19:52,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:52,939 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:53,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 20:19:53,164 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:53,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:53,164 INFO L82 PathProgramCache]: Analyzing trace with hash -428683728, now seen corresponding path program 3 times [2021-05-02 20:19:53,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:53,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870575696] [2021-05-02 20:19:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:53,171 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:53,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [215442964] [2021-05-02 20:19:53,172 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:53,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:19:53,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:53,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 20:19:53,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:53,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:53,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 82 proven. 18 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-02 20:19:53,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:53,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870575696] [2021-05-02 20:19:53,439 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:53,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215442964] [2021-05-02 20:19:53,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215442964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:53,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:53,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:19:53,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927582438] [2021-05-02 20:19:53,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:19:53,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:53,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:19:53,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:19:53,440 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:19:57,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:57,616 INFO L93 Difference]: Finished difference Result 266 states and 321 transitions. [2021-05-02 20:19:57,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:19:57,617 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 92 [2021-05-02 20:19:57,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:57,619 INFO L225 Difference]: With dead ends: 266 [2021-05-02 20:19:57,619 INFO L226 Difference]: Without dead ends: 266 [2021-05-02 20:19:57,619 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:19:57,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-02 20:19:57,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 252. [2021-05-02 20:19:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 152 states have (on average 1.131578947368421) internal successors, (172), 158 states have internal predecessors, (172), 65 states have call successors, (65), 35 states have call predecessors, (65), 34 states have return successors, (63), 58 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-02 20:19:57,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 300 transitions. [2021-05-02 20:19:57,627 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 300 transitions. Word has length 92 [2021-05-02 20:19:57,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:57,627 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 300 transitions. [2021-05-02 20:19:57,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:19:57,627 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 300 transitions. [2021-05-02 20:19:57,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:19:57,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:57,628 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:57,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 20:19:57,845 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:57,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:57,845 INFO L82 PathProgramCache]: Analyzing trace with hash 264417969, now seen corresponding path program 11 times [2021-05-02 20:19:57,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:57,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262375534] [2021-05-02 20:19:57,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:57,857 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:57,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382900664] [2021-05-02 20:19:57,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:57,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 20:19:57,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:57,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:19:57,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:57,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:57,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 20:19:58,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:58,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262375534] [2021-05-02 20:19:58,288 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:58,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382900664] [2021-05-02 20:19:58,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382900664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:58,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:58,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:58,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047263535] [2021-05-02 20:19:58,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:58,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:58,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:58,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:58,290 INFO L87 Difference]: Start difference. First operand 252 states and 300 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:19:58,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:58,633 INFO L93 Difference]: Finished difference Result 280 states and 337 transitions. [2021-05-02 20:19:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:19:58,634 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-02 20:19:58,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:58,635 INFO L225 Difference]: With dead ends: 280 [2021-05-02 20:19:58,635 INFO L226 Difference]: Without dead ends: 280 [2021-05-02 20:19:58,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:19:58,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-02 20:19:58,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 266. [2021-05-02 20:19:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 161 states have (on average 1.1304347826086956) internal successors, (182), 167 states have internal predecessors, (182), 68 states have call successors, (68), 37 states have call predecessors, (68), 36 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 20:19:58,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 316 transitions. [2021-05-02 20:19:58,643 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 316 transitions. Word has length 92 [2021-05-02 20:19:58,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:58,644 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 316 transitions. [2021-05-02 20:19:58,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:19:58,644 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 316 transitions. [2021-05-02 20:19:58,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:19:58,645 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:58,645 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:58,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:58,869 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:58,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:58,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1542255729, now seen corresponding path program 12 times [2021-05-02 20:19:58,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:58,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102470103] [2021-05-02 20:19:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:58,875 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:58,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486285942] [2021-05-02 20:19:58,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:58,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 20:19:58,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:58,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 20:19:58,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:58,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:58,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:59,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:59,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 42 proven. 47 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 20:19:59,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:59,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102470103] [2021-05-02 20:19:59,168 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:59,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486285942] [2021-05-02 20:19:59,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486285942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:59,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:59,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:19:59,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777750805] [2021-05-02 20:19:59,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:19:59,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:59,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:19:59,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:19:59,170 INFO L87 Difference]: Start difference. First operand 266 states and 316 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:20:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:03,635 INFO L93 Difference]: Finished difference Result 322 states and 402 transitions. [2021-05-02 20:20:03,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:20:03,635 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 92 [2021-05-02 20:20:03,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:03,637 INFO L225 Difference]: With dead ends: 322 [2021-05-02 20:20:03,637 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 20:20:03,637 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:20:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 20:20:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 280. [2021-05-02 20:20:03,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 167 states have (on average 1.1377245508982037) internal successors, (190), 173 states have internal predecessors, (190), 76 states have call successors, (76), 37 states have call predecessors, (76), 36 states have return successors, (74), 69 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 20:20:03,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 340 transitions. [2021-05-02 20:20:03,645 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 340 transitions. Word has length 92 [2021-05-02 20:20:03,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:03,645 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 340 transitions. [2021-05-02 20:20:03,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:20:03,646 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 340 transitions. [2021-05-02 20:20:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:20:03,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:03,646 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:03,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 20:20:03,857 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:03,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:03,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2059609870, now seen corresponding path program 13 times [2021-05-02 20:20:03,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:03,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515861547] [2021-05-02 20:20:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:03,867 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:03,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940411730] [2021-05-02 20:20:03,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:03,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 20:20:03,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:03,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:03,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 20:20:04,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:04,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515861547] [2021-05-02 20:20:04,273 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:04,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940411730] [2021-05-02 20:20:04,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940411730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:04,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:04,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:20:04,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971552369] [2021-05-02 20:20:04,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:20:04,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:04,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:20:04,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:20:04,274 INFO L87 Difference]: Start difference. First operand 280 states and 340 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:20:04,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:04,598 INFO L93 Difference]: Finished difference Result 302 states and 367 transitions. [2021-05-02 20:20:04,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:20:04,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-02 20:20:04,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:04,600 INFO L225 Difference]: With dead ends: 302 [2021-05-02 20:20:04,600 INFO L226 Difference]: Without dead ends: 302 [2021-05-02 20:20:04,601 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:20:04,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-02 20:20:04,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 288. [2021-05-02 20:20:04,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 173 states have (on average 1.1329479768786128) internal successors, (196), 179 states have internal predecessors, (196), 76 states have call successors, (76), 39 states have call predecessors, (76), 38 states have return successors, (74), 69 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 20:20:04,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 346 transitions. [2021-05-02 20:20:04,609 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 346 transitions. Word has length 92 [2021-05-02 20:20:04,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:04,609 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 346 transitions. [2021-05-02 20:20:04,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:20:04,609 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 346 transitions. [2021-05-02 20:20:04,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:20:04,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:04,610 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:04,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:04,811 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:04,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:04,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1250826676, now seen corresponding path program 14 times [2021-05-02 20:20:04,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:04,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809850642] [2021-05-02 20:20:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:04,817 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:04,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923357217] [2021-05-02 20:20:04,818 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:04,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:20:04,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:04,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 20:20:04,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:04,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:04,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-02 20:20:05,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:05,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809850642] [2021-05-02 20:20:05,192 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:05,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923357217] [2021-05-02 20:20:05,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923357217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:05,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:05,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:20:05,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279667690] [2021-05-02 20:20:05,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:20:05,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:05,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:20:05,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:20:05,194 INFO L87 Difference]: Start difference. First operand 288 states and 346 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:20:05,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:05,506 INFO L93 Difference]: Finished difference Result 326 states and 397 transitions. [2021-05-02 20:20:05,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:20:05,507 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 20:20:05,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:05,508 INFO L225 Difference]: With dead ends: 326 [2021-05-02 20:20:05,509 INFO L226 Difference]: Without dead ends: 322 [2021-05-02 20:20:05,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:20:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-02 20:20:05,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2021-05-02 20:20:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 194 states have (on average 1.134020618556701) internal successors, (220), 200 states have internal predecessors, (220), 85 states have call successors, (85), 43 states have call predecessors, (85), 42 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-02 20:20:05,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 388 transitions. [2021-05-02 20:20:05,517 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 388 transitions. Word has length 97 [2021-05-02 20:20:05,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:05,517 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 388 transitions. [2021-05-02 20:20:05,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:20:05,517 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 388 transitions. [2021-05-02 20:20:05,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:20:05,518 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:05,518 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:05,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 20:20:05,719 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:05,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:05,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2018648621, now seen corresponding path program 15 times [2021-05-02 20:20:05,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:05,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878002495] [2021-05-02 20:20:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:05,726 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:05,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927376106] [2021-05-02 20:20:05,726 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:05,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:20:05,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:05,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:20:05,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:12,060 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 20:20:12,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:12,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 20:20:12,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:12,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878002495] [2021-05-02 20:20:12,108 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:12,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927376106] [2021-05-02 20:20:12,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927376106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:12,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:12,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:20:12,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57812613] [2021-05-02 20:20:12,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:20:12,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:12,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:20:12,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=87, Unknown=1, NotChecked=0, Total=110 [2021-05-02 20:20:12,109 INFO L87 Difference]: Start difference. First operand 322 states and 388 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:20:43,134 WARN L205 SmtUtils]: Spent 16.20 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-02 20:21:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:01,647 INFO L93 Difference]: Finished difference Result 357 states and 447 transitions. [2021-05-02 20:21:01,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:21:01,656 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 97 [2021-05-02 20:21:01,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:01,658 INFO L225 Difference]: With dead ends: 357 [2021-05-02 20:21:01,658 INFO L226 Difference]: Without dead ends: 353 [2021-05-02 20:21:01,658 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 22348.4ms TimeCoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2021-05-02 20:21:01,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-02 20:21:01,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 345. [2021-05-02 20:21:01,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 207 states have (on average 1.1545893719806763) internal successors, (239), 213 states have internal predecessors, (239), 94 states have call successors, (94), 44 states have call predecessors, (94), 43 states have return successors, (92), 87 states have call predecessors, (92), 92 states have call successors, (92) [2021-05-02 20:21:01,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 425 transitions. [2021-05-02 20:21:01,667 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 425 transitions. Word has length 97 [2021-05-02 20:21:01,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:01,668 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 425 transitions. [2021-05-02 20:21:01,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:21:01,668 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 425 transitions. [2021-05-02 20:21:01,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:21:01,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:01,669 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:01,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 20:21:01,885 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:01,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:01,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2019996691, now seen corresponding path program 16 times [2021-05-02 20:21:01,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:01,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490113116] [2021-05-02 20:21:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:01,894 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:01,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160214602] [2021-05-02 20:21:01,894 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:01,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:21:01,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:01,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-02 20:21:01,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:01,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:01,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:02,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 51 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-05-02 20:21:04,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:04,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490113116] [2021-05-02 20:21:04,924 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:04,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160214602] [2021-05-02 20:21:04,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160214602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:04,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:04,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:21:04,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457426317] [2021-05-02 20:21:04,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:21:04,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:04,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:21:04,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:21:04,926 INFO L87 Difference]: Start difference. First operand 345 states and 425 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:21:05,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:05,806 INFO L93 Difference]: Finished difference Result 381 states and 473 transitions. [2021-05-02 20:21:05,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:21:05,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 20:21:05,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:05,810 INFO L225 Difference]: With dead ends: 381 [2021-05-02 20:21:05,810 INFO L226 Difference]: Without dead ends: 373 [2021-05-02 20:21:05,810 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 371.9ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:21:05,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-02 20:21:05,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 355. [2021-05-02 20:21:05,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 214 states have (on average 1.1495327102803738) internal successors, (246), 221 states have internal predecessors, (246), 95 states have call successors, (95), 46 states have call predecessors, (95), 45 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-02 20:21:05,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 434 transitions. [2021-05-02 20:21:05,819 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 434 transitions. Word has length 97 [2021-05-02 20:21:05,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:05,819 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 434 transitions. [2021-05-02 20:21:05,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:21:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 434 transitions. [2021-05-02 20:21:05,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:21:05,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:05,821 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:06,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 20:21:06,036 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:06,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:06,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1249478606, now seen corresponding path program 4 times [2021-05-02 20:21:06,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:06,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931967181] [2021-05-02 20:21:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:06,043 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:06,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356029894] [2021-05-02 20:21:06,043 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:06,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:21:06,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:06,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 20:21:06,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:06,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 61 proven. 72 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-05-02 20:21:06,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:06,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931967181] [2021-05-02 20:21:06,778 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:06,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356029894] [2021-05-02 20:21:06,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356029894] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:06,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:06,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:21:06,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551183098] [2021-05-02 20:21:06,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:21:06,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:06,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:21:06,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:21:06,780 INFO L87 Difference]: Start difference. First operand 355 states and 434 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:21:07,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:07,382 INFO L93 Difference]: Finished difference Result 390 states and 493 transitions. [2021-05-02 20:21:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:21:07,383 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 20:21:07,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:07,385 INFO L225 Difference]: With dead ends: 390 [2021-05-02 20:21:07,385 INFO L226 Difference]: Without dead ends: 383 [2021-05-02 20:21:07,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 334.6ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:21:07,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-02 20:21:07,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2021-05-02 20:21:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 229 states have (on average 1.1572052401746724) internal successors, (265), 236 states have internal predecessors, (265), 107 states have call successors, (107), 47 states have call predecessors, (107), 46 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2021-05-02 20:21:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 477 transitions. [2021-05-02 20:21:07,394 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 477 transitions. Word has length 97 [2021-05-02 20:21:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:07,394 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 477 transitions. [2021-05-02 20:21:07,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:21:07,395 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 477 transitions. [2021-05-02 20:21:07,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 20:21:07,396 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:07,396 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:07,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:07,617 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:07,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1800353058, now seen corresponding path program 17 times [2021-05-02 20:21:07,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:07,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116795696] [2021-05-02 20:21:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:07,622 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:07,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417460618] [2021-05-02 20:21:07,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:08,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-02 20:21:08,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:08,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:21:08,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-02 20:21:08,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:08,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116795696] [2021-05-02 20:21:08,412 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:08,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417460618] [2021-05-02 20:21:08,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417460618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:08,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:08,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:21:08,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484248910] [2021-05-02 20:21:08,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:21:08,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:08,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:21:08,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:21:08,414 INFO L87 Difference]: Start difference. First operand 383 states and 477 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 20:21:08,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:08,597 INFO L93 Difference]: Finished difference Result 397 states and 493 transitions. [2021-05-02 20:21:08,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:21:08,598 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 105 [2021-05-02 20:21:08,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:08,600 INFO L225 Difference]: With dead ends: 397 [2021-05-02 20:21:08,600 INFO L226 Difference]: Without dead ends: 397 [2021-05-02 20:21:08,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:21:08,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-05-02 20:21:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2021-05-02 20:21:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 236 states have (on average 1.152542372881356) internal successors, (272), 244 states have internal predecessors, (272), 108 states have call successors, (108), 49 states have call predecessors, (108), 48 states have return successors, (106), 99 states have call predecessors, (106), 106 states have call successors, (106) [2021-05-02 20:21:08,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 486 transitions. [2021-05-02 20:21:08,609 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 486 transitions. Word has length 105 [2021-05-02 20:21:08,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:08,610 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 486 transitions. [2021-05-02 20:21:08,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 20:21:08,610 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 486 transitions. [2021-05-02 20:21:08,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 20:21:08,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:08,611 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:08,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 20:21:08,811 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:08,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1609273058, now seen corresponding path program 18 times [2021-05-02 20:21:08,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:08,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766177287] [2021-05-02 20:21:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:08,819 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:08,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223022513] [2021-05-02 20:21:08,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:09,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 20:21:09,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:09,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:21:09,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:09,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 67 proven. 53 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-05-02 20:21:09,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:09,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766177287] [2021-05-02 20:21:09,681 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:09,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223022513] [2021-05-02 20:21:09,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223022513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:09,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:09,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:21:09,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729945404] [2021-05-02 20:21:09,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:21:09,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:09,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:21:09,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:21:09,682 INFO L87 Difference]: Start difference. First operand 393 states and 486 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 20:21:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:11,941 INFO L93 Difference]: Finished difference Result 409 states and 498 transitions. [2021-05-02 20:21:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:21:11,941 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 105 [2021-05-02 20:21:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:11,943 INFO L225 Difference]: With dead ends: 409 [2021-05-02 20:21:11,943 INFO L226 Difference]: Without dead ends: 409 [2021-05-02 20:21:11,943 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:21:11,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-02 20:21:11,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 402. [2021-05-02 20:21:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 245 states have (on average 1.146938775510204) internal successors, (281), 252 states have internal predecessors, (281), 105 states have call successors, (105), 52 states have call predecessors, (105), 51 states have return successors, (103), 97 states have call predecessors, (103), 103 states have call successors, (103) [2021-05-02 20:21:11,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 489 transitions. [2021-05-02 20:21:11,952 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 489 transitions. Word has length 105 [2021-05-02 20:21:11,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:11,953 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 489 transitions. [2021-05-02 20:21:11,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 20:21:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 489 transitions. [2021-05-02 20:21:11,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:21:11,954 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:11,954 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:12,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:12,155 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:12,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:12,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1190597354, now seen corresponding path program 19 times [2021-05-02 20:21:12,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:12,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947576669] [2021-05-02 20:21:12,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:12,164 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:12,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612869329] [2021-05-02 20:21:12,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:12,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 20:21:12,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:12,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-05-02 20:21:12,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:12,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947576669] [2021-05-02 20:21:12,702 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:12,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612869329] [2021-05-02 20:21:12,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612869329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:12,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:12,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:21:12,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379493699] [2021-05-02 20:21:12,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:21:12,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:12,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:21:12,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:21:12,704 INFO L87 Difference]: Start difference. First operand 402 states and 489 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:21:13,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:13,136 INFO L93 Difference]: Finished difference Result 432 states and 526 transitions. [2021-05-02 20:21:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:21:13,137 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2021-05-02 20:21:13,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:13,139 INFO L225 Difference]: With dead ends: 432 [2021-05-02 20:21:13,139 INFO L226 Difference]: Without dead ends: 432 [2021-05-02 20:21:13,139 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:21:13,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-05-02 20:21:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 428. [2021-05-02 20:21:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 262 states have (on average 1.1488549618320612) internal successors, (301), 268 states have internal predecessors, (301), 110 states have call successors, (110), 56 states have call predecessors, (110), 55 states have return successors, (108), 103 states have call predecessors, (108), 108 states have call successors, (108) [2021-05-02 20:21:13,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 519 transitions. [2021-05-02 20:21:13,148 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 519 transitions. Word has length 110 [2021-05-02 20:21:13,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:13,149 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 519 transitions. [2021-05-02 20:21:13,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:21:13,149 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 519 transitions. [2021-05-02 20:21:13,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:21:13,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:13,150 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:13,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 20:21:13,373 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:13,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:13,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1826532182, now seen corresponding path program 20 times [2021-05-02 20:21:13,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:13,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233550970] [2021-05-02 20:21:13,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:13,380 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:13,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121062247] [2021-05-02 20:21:13,381 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:13,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:21:13,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:13,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 20:21:13,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:13,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:13,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:14,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 104 proven. 69 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-05-02 20:21:14,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:14,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233550970] [2021-05-02 20:21:14,033 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:14,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121062247] [2021-05-02 20:21:14,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121062247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:14,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:14,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:21:14,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377592462] [2021-05-02 20:21:14,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:21:14,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:14,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:21:14,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:21:14,034 INFO L87 Difference]: Start difference. First operand 428 states and 519 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:21:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:14,646 INFO L93 Difference]: Finished difference Result 468 states and 569 transitions. [2021-05-02 20:21:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:21:14,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2021-05-02 20:21:14,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:14,649 INFO L225 Difference]: With dead ends: 468 [2021-05-02 20:21:14,649 INFO L226 Difference]: Without dead ends: 468 [2021-05-02 20:21:14,650 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 301.3ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:21:14,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-02 20:21:14,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2021-05-02 20:21:14,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 279 states have (on average 1.146953405017921) internal successors, (320), 284 states have internal predecessors, (320), 115 states have call successors, (115), 60 states have call predecessors, (115), 59 states have return successors, (113), 109 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-02 20:21:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 548 transitions. [2021-05-02 20:21:14,662 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 548 transitions. Word has length 110 [2021-05-02 20:21:14,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:14,662 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 548 transitions. [2021-05-02 20:21:14,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:21:14,662 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 548 transitions. [2021-05-02 20:21:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:21:14,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:14,663 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:14,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 20:21:14,888 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:14,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:14,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1133430485, now seen corresponding path program 21 times [2021-05-02 20:21:14,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:14,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384734514] [2021-05-02 20:21:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:14,894 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:14,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423064625] [2021-05-02 20:21:14,894 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true